Wikipedia

Delaware Valley

Not to be confused with Delaware County, Pennsylvania.
"Philadelphia metropolitan area" redirects here. Not to be confused with Metropolis of Philadelphia.

The Delaware Valley, sometimes referred to as Greater Philadelphia, Philadelphia metropolitan area, or Philadelphia tri-state area, is a major metropolitan and tri-state region in Northeast United States that centers on Philadelphia, the 6th-most populous city in the United States, and spans part of three states: Southeastern Pennsylvania, Southern New Jersey, and Northern Delaware. With a core of metropolitan statistical area population of 6.288 million residents, while the combined statistical area population of 7.366 million (as of the 2020 census), Delaware Valley is the eighth-largest metropolitan region in the United States and the 68th-largest metropolitan region in the world.

Delaware Valley
Greater Philadelphia
Philadelphia metropolitan area
Philadelphia-Camden-Wilmington, PA-NJ-DE-MD CSA
Combined Statistical Area
Center City Philadelphia (in background) and the Schuylkill River (on left) as seen from South Street Bridge in July 2016
Center City Philadelphia (in background) and the Schuylkill River (on left) as seen from South Street Bridge in July 2016
Map
Philadelphia–Reading–Camden, PA–NJ–DE–MD CSA
Country United States
States Pennsylvania
New Jersey
Delaware
Maryland
Principal cityPhiladelphia
Satellite cities and townsCamden
Wilmington
Atlantic City
Reading
Trenton[a]
Vineland
Conshohocken
Dover
Chester
Upper Darby
Media
Middletown Township
Hammonton
Pennsauken Township
Norristown
Doylestown
Cherry Hill
West Chester
Evesham
Washington Township
Millville
Salem
Cape May Court House
Lower Township
The Wildwoods
Brigantine
Ventnor City
Margate City
Ocean City
Sea Isle City
Haverford
Bridgeton
Coatesville
Lower Merion
Gloucester Township
Downingtown
Phoenixville
New Castle
Pottstown
King of Prussia
Bensalem Township
Burlington City and Burlington Township
Middle Township (Cape May County)
Mount Holly
Newark
Hamilton Township (Mays Landing)
Woodbury
Elkton
Cheltenham Township
Abington Township
Bristol Township
Mount Laurel
Northampton Township
Winslow Township
New Hope
Falls Township
Middletown Township (Bucks County)
Egg Harbor Township
Galloway Township
Pennsville
Maurice River Township
Area
 • Urban
1,981.4 sq mi (5,131.7 km2)
 • Metro
5,118 sq mi (13,256 km2)
Elevation
[1][dubious – discuss][2]
0 - 1,080 ft (0 - 329 m)
Population
 (2021 est.)
 • Urban
5,441,567 (5th)
 • Metro density1,217.00/sq mi (469.89/km2)
 • MSA
6,228,601 (7th)
 • CSA
7,366,346 (9th)
 MSA/CSA = 2021, Urban = 2010
GDP
[3]
 • MSA$518.5 billion (2022)
Time zoneUTC−5 (EST)
 • Summer (DST)UTC−4 (EST)
Area codes215/267/445, 302, 410/443/667, 609/640, 610/484/835, 717/223, 856

In addition to Philadelphia, other major population centers in the Delaware Valley include Reading, Upper Darby Township, and Chester in Pennsylvania; Atlantic City, Camden, Vineland, and Cherry Hill in South Jersey; and Wilmington and Dover in Delaware. As of 2022, the Philadelphia metropolitan area's gross domestic product (GDP) exceeds US$518 billion, making it the tenth-largest metropolitan economy in the nation.[3]

The Delaware Valley has been influential in the nation's history and economy and home to many people and sites significant to American culture, history, and politics. Philadelphia is sometimes known as "The Birthplace of America"[4] in reference to its role as the revolutionary capital during the colonial era in which the Second Continental Congress gathered at Independence Hall and unanimously adopted the Declaration of Independence, authorized the formation of the Continental Army, and appointed George Washington its commander to resist the British. After the Continental Army's victory, Philadelphia served as the nation's first capital for most of the 18th century until 1800, when construction of Washington, D.C. was completed. The U.S. Constitution, the world's longest-standing body of federal law, was ratified at Independence Hall in Philadelphia in 1789.

The Delaware Valley is one of the nation's leading regions for academia and academic research with a considerable number of globally-known and highly ranked universities, including the University of Pennsylvania, one of the nation's eight Ivy League universities. Other major universities and colleges in the region include Drexel University, Thomas Jefferson University, Rowan University, Villanova University, Saint Joseph's University, Temple University, Rutgers University–Camden, La Salle University, the University of Delaware, Stockton University, and others.[5]

Philadelphia and the Delaware Valley are a biotechnology hub.[6] As of 2024, metropolitan Philadelphia ranks as one of the Big Five U.S. venture capital hubs, facilitated by its proximity to both New York City's entrepreneurial and financial ecosystems and to the federal regulatory environment of Washington, D.C.[7] Elsewhere in the Delaware Valley, South Jersey has emerged as an East Coast epicenter for logistics and major warehouses.[8]

Culturally, the region is home to the dialect or accent known as Philadelphia English, shares a unique cuisine known as Philadelphia cuisine, has played a formidable role in popular music, and is known for having one of the nation's most passionate and devoted sports cultures centered around its five professional sports teams.

Geography and population

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See also: Geography of Pennsylvania, Geography of New Jersey, and Geography of Delaware
 
The drainage basin of the Delaware River

The Delaware Valley is geographically associated and proximate to the Delaware River and its three primary tributaries, the Schuylkill River, Lehigh River, and Brandywine Creek.

U.S. government agencies have reached various definitions of the Delaware Valley and metropolitan Philadelphia. The Office of Management and Budget (OMB) defines metropolitan statistical area (MSAs), which are regions with relatively high population densities at their cores and close economic ties throughout their respective areas. MSAs are further combined into combined statistical areas (CSAs), reflecting commuting patterns. Neither is a formal administrative division.

Metropolitan statistical area (MSA)

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Historical population
CensusPop.Note%±
1820171,430—
1830228,20333.1%
1840305,27833.8%
1850467,05353.0%
1860636,02936.2%
1870841,23032.3%
18801,062,67726.3%
18901,391,15730.9%
19001,892,49636.0%
19102,268,20919.9%
19202,714,27119.7%
19303,137,04015.6%
19403,299,6375.2%
19503,671,04811.3%
19604,757,46229.6%
19705,317,40711.8%
19805,240,039−1.5%
19905,435,4683.7%
20005,687,1474.6%
20105,965,3434.9%
20206,245,0514.7%
2022 (est.)6,241,164−0.1%
U.S. Decennial Census

As of the 2020 U.S. census, the Philadelphia-Camden-Wilmington Metropolitan Statistical Area is the seventh-largest MSA in the nation with 6,245,051 people.[9] The MSA includes:

County 2021 Estimate 2020 Census Change Area Density
Philadelphia County 1,576,251 1,603,797 −1.72% 134.28 sq mi (347.8 km2) 11,739/sq mi (4,532/km2)
Montgomery County 860,578 856,553 +0.47% 483 sq mi (1,250 km2) 1,782/sq mi (688/km2)
Bucks County 646,098 646,538 −0.07% 604 sq mi (1,560 km2) 1,070/sq mi (413/km2)
Delaware County 573,849 576,830 −0.52% 184 sq mi (480 km2) 3,119/sq mi (1,204/km2)
New Castle County 571,708 570,719 +0.17% 426 sq mi (1,100 km2) 1,342/sq mi (518/km2)
Chester County 538,649 534,413 +0.79% 751 sq mi (1,950 km2) 717/sq mi (277/km2)
Camden County 523,771 523,485 +0.05% 221.26 sq mi (573.1 km2) 2,367/sq mi (914/km2)
Burlington County 464,269 461,860 +0.52% 798.58 sq mi (2,068.3 km2) 581/sq mi (224/km2)
Gloucester County 304,477 302,294 +0.72% 322 sq mi (830 km2) 946/sq mi (365/km2)
Salem County 65,046 64,837 +0.32% 331.9 sq mi (860 km2) 196/sq mi (76/km2)
Cecil County 103,725 104,870 −1.09% 418 sq mi (1,080 km2) 251/sq mi (97/km2)
Total MSA Population 6,228,601 6,245,051 −0.26% 4,602.02 sq mi (11,919.2 km2) 1,353/sq mi (523/km2)

Combined statistical area (CSA)

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As of 2020, the Philadelphia–Reading–Camden, PA-NJ-DE-MD CSA is the nation's ninth-largest combined statistical area with a population of 7,379,700. Philadelphia-Reading-Camden Combined Statistical Area includes:

County 2021 Estimate 2020 Census Change Area Density
Berks County 429,342 428,849 +0.11% 857 sq mi (2,220 km2) 501/sq mi (193/km2)
Atlantic County 274,966 274,534 +0.16% 555.7 sq mi (1,439 km2) 495/sq mi (191/km2)
Kent County 184,149 181,851 +1.26% 586 sq mi (1,520 km2) 314/sq mi (121/km2)
Cumberland County 153,627 154,152 −0.34% 483.7 sq mi (1,253 km2) 318/sq mi (123/km2)
Cape May County 95,661 95,263 +0.42% 251.42 sq mi (651.2 km2) 380/sq mi (147/km2)
Total CSA Population 7,366,346 7,379,700 −0.18% 7,335.84 sq mi (18,999.7 km2) 1,004/sq mi (388/km2)
 
The Delaware Valley is part of the Northeast megalopolis, the second-most highly populated megaregion of the U.S. with 52.3 million residents.

Statistical history

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When metropolitan areas were originally defined in 1950, most of the area now in the Delaware Valley was split between four metropolitan areas, or standard metropolitan areas, as they were then called. The Philadelphia SMA included Philadelphia, Bucks, Chester, Delaware, and Montgomery counties in Pennsylvania, and Burlington, Camden, and Gloucester counties in South Jersey. The Wilmington SMA included New Castle County in Delaware and Salem County in South Jersey. Berks County was designated as the Reading SMA and Atlantic County, New Jersey was the Atlantic City SMA.

In 1960, Cecil County, Maryland was added to what was now the Wilmington Standard Metropolitan Statistical Area (SMSA). In 1980, Cumberland County, New Jersey was defined as the Vineland-Millville-Bridgeton SMSA.

In 1990, the Philadelphia, Wilmington and Vineland-Millville-Bridgeton SMSAs were merged with the Trenton SMSA to form the Philadelphia-Wilmington-Trenton Consolidated Metropolitan Statistical Area. At the same time, Cape May County, New Jersey was added to the Atlantic City SMSA. The "Philadelphia-Wilmington-Trenton" became obsolete one census later when Trenton, New Jersey was moved to the New York-Newark-Bridgeport CSA. The Philadelphia-Wilmington-Vineland CSA included the Philadelphia-Wilmington-Camden MSA and the Vineland-Millville-Bridgeton MSA.[10]

In 2000, Kent County, Delaware was designated the Dover MSA, and Kent County and Atlantic City were added to the Philadelphia CSA in 2010. As a result of new 2010 definitions, based on a threshold of 15% labor interchange between MSAs, two additional MSAs were added, Ocean City, New Jersey and Reading, Pennsylvania. The CSA to which they belong is known as Philadelphia-Reading-Camden.[11]

Subregions

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The Philadelphia-Reading-Camden combined statistical area includes sixteen counties in four states. The five Pennsylvania counties in the metropolitan statistical area are collectively known as Southeastern Pennsylvania.[12] In addition to Philadelphia, major municipalities in Southeastern Pennsylvania include the inner suburbs of Upper Darby Township and Bensalem Township. Berks County, which forms its own MSA and contains the CSA's second largest city, Reading, is occasionally not considered to be part of Southeastern Pennsylvania and is sometimes assigned to South Central Pennsylvania.

The seven New Jersey counties in the CSA are in South Jersey.[13] Atlantic County, Cape May County, and Cumberland County each form their own respective metropolitan statistical areas. Atlantic City, Cape May County, New Jersey, and the southern Jersey Shore, including Margate City, Ventnor City, the Wildwoods, and Sea Isle City, are major tourist destinations for people from inside and outside of the Delaware Valley. Other major municipalities in South Jersey include Cherry Hill and Camden, which is across the Delaware River, east of Philadelphia. Burlington, Camden, Gloucester, and Salem Counties comprise the Delware River Region, one of seven officially recognized tourism regions by the New Jersey Department of Tourism.[14]

The two counties of Delaware in the CSA constitute a majority of Delaware's land mass and population. Wilmington is the most populous city in Delaware and the fifth-most populous municipality in the Delaware Valley. The lone Maryland county in the Philadelphia-Reading-Camden Combined Statistical Area is part of the region known as the Eastern Shore of Maryland.

Ethnically, Indians make up the largest foreign-born population in the greater Delaware Valley.[15]

Largest municipalities

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Philadelphia, the most populous city in the Delaware Valley and sixth-most populous city in the nation with over 1.6 million residents
 
Reading, Pennsylvania
 
Ocean City, New Jersey
 
Wilmington, Delaware
See also: List of municipalities in Delaware, List of municipalities in Maryland, List of municipalities in New Jersey, and List of municipalities in Pennsylvania

The following municipalities are all within the Philadelphia-Reading-Camden combined statistical area and part of the Delaware Valley:

City Pop.[16] County State
Philadelphia 1,567,872 Philadelphia PA
Reading 87,575 Berks PA
Upper Darby Township 82,765 Delaware PA
Camden 74,420 Camden NJ
Wilmington 71,502 New Castle DE
Cherry Hill 70,976 Camden NJ
Gloucester Township 64,049 Camden NJ
Vineland 60,876 Cumberland NJ
Bensalem Township 60,354 Bucks PA
Lower Merion Township 58,220 Montgomery PA
Abington Township 55,640 Montgomery PA
Bristol Township 54,170 Bucks PA
Haverford Township 48,893 Delaware PA
Washington Township 48,301 Gloucester NJ
Evesham Township 45,578 Burlington NJ
Middletown Township 45,318 Bucks PA
Egg Harbor Township 43,747 Atlantic NJ
Mount Laurel 41,849 Burlington NJ
Northampton Township 39,562 Bucks PA
Winslow Township 39,417 Camden NJ

Climate

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The Delaware Valley has four distinct seasons with ample precipitation and is divided by the 0 °C (32 °F) January isotherm. Philadelphia and the New Jersey portion of the area, almost all of the Delaware and Maryland portions, most of Delaware County and lower Bucks County, lowland southern Chester County, and some southern and lowland areas of Montgomery County have a humid subtropical climate (Cfa according to the Köppen climate classification.) The remainder of the Delaware Valley has a hot-summer humid continental climate (Dfa.) PRISM Climate Group at Oregon State University

Snow amounts may vary widely year-to-year and normally do vary widely within the Delaware Valley. The region has two ski resorts, Bear Creek Mountain Resort in Longswamp Township, Berks County and Spring Mountain Adventures in central Montgomery County.

Using the -3 °C January isotherm as a boundary, all of the Delaware Valley is humid subtropical. The hardiness zone in the region ranges from 6b in higher areas of Berks and northern Bucks Counties to 8a in Atlantic City and Cape May. [1]

Using the Trewartha climate classification system, which requires eight months to average at least 50 °F for the climate to be considered subtropical, the region only has seven such months, so the area considered Cfa by Köppen is oceanic (Do) in the Trewartha system.

Climate data for Philadelphia (Philadelphia Airport), 1991–2020 normals,[b] extremes 1872–present[c]
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 74
(23) 		79
(26) 		87
(31) 		95
(35) 		97
(36) 		102
(39) 		104
(40) 		106
(41) 		102
(39) 		96
(36) 		84
(29) 		73
(23) 		106
(41)
Mean maximum °F (°C) 63.3
(17.4) 		63.5
(17.5) 		73.8
(23.2) 		84.3
(29.1) 		90.2
(32.3) 		94.8
(34.9) 		97.1
(36.2) 		94.8
(34.9) 		90.6
(32.6) 		82.6
(28.1) 		72.4
(22.4) 		64.2
(17.9) 		98.1
(36.7)
Mean daily maximum °F (°C) 41.3
(5.2) 		44.3
(6.8) 		52.8
(11.6) 		64.7
(18.2) 		74.4
(23.6) 		83.2
(28.4) 		87.8
(31.0) 		85.8
(29.9) 		78.9
(26.1) 		67.2
(19.6) 		55.9
(13.3) 		46.0
(7.8) 		65.2
(18.4)
Daily mean °F (°C) 33.7
(0.9) 		35.9
(2.2) 		43.6
(6.4) 		54.5
(12.5) 		64.3
(17.9) 		73.5
(23.1) 		78.7
(25.9) 		76.8
(24.9) 		69.9
(21.1) 		58.2
(14.6) 		47.4
(8.6) 		38.6
(3.7) 		56.3
(13.5)
Mean daily minimum °F (°C) 26.0
(−3.3) 		27.5
(−2.5) 		34.3
(1.3) 		44.3
(6.8) 		54.2
(12.3) 		63.9
(17.7) 		69.6
(20.9) 		67.9
(19.9) 		60.9
(16.1) 		49.2
(9.6) 		38.8
(3.8) 		31.2
(−0.4) 		47.3
(8.5)
Mean minimum °F (°C) 10.7
(−11.8) 		13.7
(−10.2) 		20.8
(−6.2) 		33.0
(0.6) 		43.1
(6.2) 		53.2
(11.8) 		62.2
(16.8) 		60.3
(15.7) 		49.5
(9.7) 		37.1
(2.8) 		26.4
(−3.1) 		19.0
(−7.2) 		8.6
(−13.0)
Record low °F (°C) −7
(−22) 		−11
(−24) 		5
(−15) 		14
(−10) 		28
(−2) 		44
(7) 		51
(11) 		44
(7) 		35
(2) 		25
(−4) 		8
(−13) 		−5
(−21) 		−11
(−24)
Average precipitation inches (mm) 3.13
(80) 		2.75
(70) 		3.96
(101) 		3.47
(88) 		3.34
(85) 		4.04
(103) 		4.38
(111) 		4.29
(109) 		4.40
(112) 		3.47
(88) 		2.91
(74) 		3.97
(101) 		44.11
(1,120)
Average snowfall inches (cm) 7.1
(18) 		8.4
(21) 		3.6
(9.1) 		0.3
(0.76) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.2
(0.51) 		3.5
(8.9) 		23.1
(59)
Average precipitation days (≥ 0.01 in) 11.0 9.7 10.9 10.9 11.0 10.3 10.1 8.9 9.3 9.1 8.6 11.0 120.8
Average snowy days (≥ 0.1 in) 4.1 3.8 2.0 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.1 1.8 12.0
Average relative humidity (%) 66.2 63.6 61.7 60.4 65.4 67.8 69.6 70.4 71.6 70.8 68.4 67.7 67.0
Average dew point °F (°C) 19.8
(−6.8) 		21.0
(−6.1) 		28.6
(−1.9) 		37.0
(2.8) 		49.5
(9.7) 		59.2
(15.1) 		64.6
(18.1) 		63.7
(17.6) 		57.2
(14.0) 		45.7
(7.6) 		35.6
(2.0) 		25.5
(−3.6) 		42.3
(5.7)
Mean monthly sunshine hours 155.7 154.7 202.8 217.0 245.1 271.2 275.6 260.1 219.3 204.5 154.7 137.7 2,498.4
Percent possible sunshine 52 52 55 55 55 61 61 61 59 59 52 47 56
Average ultraviolet index 2 3 4 6 8 9 9 8 6 4 2 2 5
Source 1: NOAA (relative humidity, dew point and sun 1961–1990)[20][21][18]
Source 2: Weather Atlas (UV index)[22]
Climate data for Philadelphia
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Average sea temperature °F (°C) 41.8
(5.5) 		39.9
(4.4) 		41.2
(5.1) 		46.7
(8.2) 		53.9
(12.2) 		66.3
(19.0) 		74.0
(23.3) 		75.9
(24.4) 		71.4
(21.9) 		64.2
(17.9) 		55.1
(12.8) 		47.7
(8.8) 		56.5
(13.6)
Mean daily daylight hours 10.0 11.0 12.0 13.0 14.0 15.0 15.0 14.0 12.0 11.0 10.0 9.0 12.2
Source: Weather Atlas [22]
Climate data for Atlantic City International Airport, 1991–2020 normals,[d] extremes 1874–present[e]
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 78
(26) 		76
(24) 		87
(31) 		94
(34) 		99
(37) 		106
(41) 		105
(41) 		103
(39) 		99
(37) 		96
(36) 		84
(29) 		77
(25) 		106
(41)
Mean maximum °F (°C) 63.5
(17.5) 		64.8
(18.2) 		73.2
(22.9) 		83.2
(28.4) 		89.3
(31.8) 		94.5
(34.7) 		96.9
(36.1) 		94.6
(34.8) 		90.1
(32.3) 		82.8
(28.2) 		72.7
(22.6) 		65.3
(18.5) 		98.1
(36.7)
Mean daily maximum °F (°C) 43.2
(6.2) 		45.8
(7.7) 		52.6
(11.4) 		63.3
(17.4) 		72.5
(22.5) 		81.5
(27.5) 		86.6
(30.3) 		84.8
(29.3) 		78.5
(25.8) 		67.7
(19.8) 		57.1
(13.9) 		48.1
(8.9) 		65.1
(18.4)
Daily mean °F (°C) 34.1
(1.2) 		36.0
(2.2) 		42.6
(5.9) 		52.5
(11.4) 		61.9
(16.6) 		71.4
(21.9) 		76.9
(24.9) 		75.0
(23.9) 		68.4
(20.2) 		57.1
(13.9) 		46.8
(8.2) 		38.7
(3.7) 		55.1
(12.8)
Mean daily minimum °F (°C) 25.1
(−3.8) 		26.2
(−3.2) 		32.6
(0.3) 		41.7
(5.4) 		51.4
(10.8) 		61.3
(16.3) 		67.2
(19.6) 		65.2
(18.4) 		58.2
(14.6) 		46.4
(8.0) 		36.6
(2.6) 		29.4
(−1.4) 		45.1
(7.3)
Mean minimum °F (°C) 6.5
(−14.2) 		9.7
(−12.4) 		16.1
(−8.8) 		26.7
(−2.9) 		36.0
(2.2) 		46.2
(7.9) 		55.9
(13.3) 		53.8
(12.1) 		43.5
(6.4) 		31.0
(−0.6) 		20.4
(−6.4) 		14.0
(−10.0) 		4.4
(−15.3)
Record low °F (°C) −10
(−23) 		−11
(−24) 		2
(−17) 		12
(−11) 		25
(−4) 		37
(3) 		42
(6) 		40
(4) 		32
(0) 		20
(−7) 		10
(−12) 		−7
(−22) 		−11
(−24)
Average precipitation inches (mm) 3.38
(86) 		3.23
(82) 		4.52
(115) 		3.32
(84) 		3.34
(85) 		3.58
(91) 		4.47
(114) 		4.59
(117) 		3.55
(90) 		4.14
(105) 		3.37
(86) 		4.47
(114) 		45.96
(1,167)
Average snowfall inches (cm) 5.7
(14) 		5.9
(15) 		2.2
(5.6) 		0.3
(0.76) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.1
(0.25) 		3.2
(8.1) 		17.4
(44)
Average extreme snow depth inches (cm) 3.6
(9.1) 		3.1
(7.9) 		1.3
(3.3) 		0.1
(0.25) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		1.9
(4.8) 		6.0
(15)
Average precipitation days (≥ 0.01 in) 10.8 10.4 10.9 11.4 10.5 9.9 9.9 9.2 8.5 8.9 8.9 10.8 120.1
Average snowy days (≥ 0.1 in) 3.0 3.2 1.2 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.4 8.9
Average relative humidity (%) 69.5 69.0 66.9 66.4 70.7 72.9 73.9 75.7 76.4 74.8 72.8 70.6 71.6
Average dew point °F (°C) 21.6
(−5.8) 		23.2
(−4.9) 		30.0
(−1.1) 		37.9
(3.3) 		49.5
(9.7) 		59.4
(15.2) 		64.8
(18.2) 		64.2
(17.9) 		57.7
(14.3) 		46.4
(8.0) 		37.0
(2.8) 		27.0
(−2.8) 		43.2
(6.2)
Mean monthly sunshine hours 150.8 157.9 204.5 218.9 243.9 266.2 276.3 271.3 227.6 200.5 147.4 133.8 2,499.1
Percent possible sunshine 50 53 55 55 55 60 61 64 61 58 49 46 56
Average ultraviolet index 1.6 2.6 4.2 6.0 7.5 8.5 8.6 7.7 6.0 3.8 2.1 1.5 5.0
Source 1: NOAA (relative humidity, dew point and sun 1961–1990)[24][25][26]
Source 2: UV Index Today (1995 to 2022)[27]
Climate data for Doylestown, Pennsylvania
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Mean daily maximum °F (°C) 39
(4) 		43
(6) 		52
(11) 		63
(17) 		74
(23) 		82
(28) 		87
(31) 		85
(29) 		77
(25) 		66
(19) 		55
(13) 		44
(7) 		64
(18)
Mean daily minimum °F (°C) 24
(−4) 		25
(−4) 		33
(1) 		42
(6) 		52
(11) 		61
(16) 		66
(19) 		65
(18) 		57
(14) 		45
(7) 		37
(3) 		29
(−2) 		45
(7)
Average precipitation inches (mm) 3.94
(100) 		2.87
(73) 		4.24
(108) 		3.85
(98) 		4.81
(122) 		3.61
(92) 		4.72
(120) 		4.34
(110) 		4.66
(118) 		3.35
(85) 		3.74
(95) 		3.80
(97) 		47.93
(1,217)
Source: Weather Channel [28]
Climate data for Reading, PA (Reading Regional Airport) 1991–2020 normals, extremes 1888–present
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 77
(25) 		82
(28) 		88
(31) 		97
(36) 		96
(36) 		102
(39) 		106
(41) 		105
(41) 		102
(39) 		94
(34) 		84
(29) 		77
(25) 		106
(41)
Mean daily maximum °F (°C) 38.6
(3.7) 		41.9
(5.5) 		51.0
(10.6) 		63.4
(17.4) 		73.5
(23.1) 		82.0
(27.8) 		86.5
(30.3) 		84.4
(29.1) 		77.1
(25.1) 		65.4
(18.6) 		53.8
(12.1) 		43.4
(6.3) 		63.4
(17.4)
Daily mean °F (°C) 30.8
(−0.7) 		33.1
(0.6) 		41.5
(5.3) 		52.5
(11.4) 		62.5
(16.9) 		71.6
(22.0) 		76.1
(24.5) 		74.3
(23.5) 		66.9
(19.4) 		55.2
(12.9) 		44.6
(7.0) 		35.7
(2.1) 		53.7
(12.1)
Mean daily minimum °F (°C) 23.0
(−5.0) 		24.4
(−4.2) 		31.9
(−0.1) 		41.7
(5.4) 		51.5
(10.8) 		61.2
(16.2) 		65.8
(18.8) 		64.1
(17.8) 		56.6
(13.7) 		45.0
(7.2) 		35.4
(1.9) 		28.0
(−2.2) 		44.1
(6.7)
Record low °F (°C) −20
(−29) 		−13
(−25) 		−2
(−19) 		12
(−11) 		26
(−3) 		36
(2) 		43
(6) 		39
(4) 		30
(−1) 		20
(−7) 		8
(−13) 		−6
(−21) 		−20
(−29)
Average precipitation inches (mm) 2.97
(75) 		2.61
(66) 		3.53
(90) 		3.35
(85) 		3.51
(89) 		4.77
(121) 		4.77
(121) 		4.49
(114) 		4.88
(124) 		3.80
(97) 		3.02
(77) 		3.51
(89) 		45.21
(1,148)
Average precipitation days (≥ 0.01 in) 10.3 10.2 10.7 11.6 12.5 12.4 10.7 11.2 9.1 10.1 8.9 10.8 128.5
Source: NOAA[29][30]
Climate data for Dover, Delaware (1991−2020 normals, extremes 1893–present)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 77
(25) 		80
(27) 		88
(31) 		97
(36) 		98
(37) 		101
(38) 		104
(40) 		102
(39) 		99
(37) 		95
(35) 		85
(29) 		75
(24) 		104
(40)
Mean maximum °F (°C) 66
(19) 		65
(18) 		73
(23) 		83
(28) 		88
(31) 		93
(34) 		95
(35) 		93
(34) 		89
(32) 		83
(28) 		74
(23) 		66
(19) 		96
(36)
Mean daily maximum °F (°C) 44.4
(6.9) 		47.4
(8.6) 		54.5
(12.5) 		66.0
(18.9) 		74.4
(23.6) 		82.7
(28.2) 		86.9
(30.5) 		85.1
(29.5) 		79.2
(26.2) 		68.9
(20.5) 		58.0
(14.4) 		48.6
(9.2) 		66.3
(19.1)
Daily mean °F (°C) 36.0
(2.2) 		38.2
(3.4) 		45.0
(7.2) 		55.5
(13.1) 		64.4
(18.0) 		73.2
(22.9) 		77.9
(25.5) 		76.2
(24.6) 		70.1
(21.2) 		59.2
(15.1) 		48.7
(9.3) 		40.3
(4.6) 		57.1
(13.9)
Mean daily minimum °F (°C) 27.6
(−2.4) 		29.0
(−1.7) 		35.4
(1.9) 		44.9
(7.2) 		54.4
(12.4) 		63.8
(17.7) 		69.0
(20.6) 		67.3
(19.6) 		61.0
(16.1) 		49.5
(9.7) 		39.3
(4.1) 		32.1
(0.1) 		47.8
(8.8)
Mean minimum °F (°C) 11
(−12) 		13
(−11) 		20
(−7) 		31
(−1) 		41
(5) 		51
(11) 		59
(15) 		58
(14) 		48
(9) 		34
(1) 		24
(−4) 		18
(−8) 		9
(−13)
Record low °F (°C) −7
(−22) 		−11
(−24) 		7
(−14) 		14
(−10) 		28
(−2) 		41
(5) 		45
(7) 		35
(2) 		30
(−1) 		25
(−4) 		11
(−12) 		−3
(−19) 		−11
(−24)
Average precipitation inches (mm) 3.43
(87) 		3.08
(78) 		4.21
(107) 		3.72
(94) 		3.89
(99) 		4.56
(116) 		4.14
(105) 		4.92
(125) 		4.25
(108) 		4.06
(103) 		3.36
(85) 		3.99
(101) 		47.61
(1,209)
Average snowfall inches (cm) 4.1
(10) 		5.9
(15) 		0.6
(1.5) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		2.6
(6.6) 		13.2
(34)
Average precipitation days (≥ 0.01 in) 9.7 9.2 9.8 10.3 10.5 9.2 9.0 8.2 8.2 8.0 7.4 10.2 109.7
Average snowy days (≥ 0.1 in) 1.8 1.9 0.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 4.9
Average ultraviolet index 2 3 5 6 8 9 9 8 7 4 2 2 5
Source 1: NOAA[29][30]
Source 2: Weather Atlas (UV)[31]
Climate data for Wilmington, Delaware (New Castle County Airport), 1991–2020 normals, extremes 1894–present
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 75
(24) 		78
(26) 		86
(30) 		97
(36) 		98
(37) 		102
(39) 		103
(39) 		107
(42) 		100
(38) 		98
(37) 		85
(29) 		75
(24) 		107
(42)
Mean maximum °F (°C) 63
(17) 		64
(18) 		74
(23) 		83
(28) 		89
(32) 		93
(34) 		96
(36) 		94
(34) 		90
(32) 		83
(28) 		72
(22) 		64
(18) 		97
(36)
Mean daily maximum °F (°C) 41.4
(5.2) 		44.1
(6.7) 		52.5
(11.4) 		64.2
(17.9) 		73.5
(23.1) 		82.2
(27.9) 		86.8
(30.4) 		84.9
(29.4) 		78.5
(25.8) 		67.0
(19.4) 		55.9
(13.3) 		46.0
(7.8) 		64.8
(18.2)
Daily mean °F (°C) 33.5
(0.8) 		35.5
(1.9) 		43.2
(6.2) 		53.9
(12.2) 		63.5
(17.5) 		72.6
(22.6) 		77.6
(25.3) 		75.8
(24.3) 		68.9
(20.5) 		57.2
(14.0) 		46.6
(8.1) 		38.2
(3.4) 		55.5
(13.1)
Mean daily minimum °F (°C) 25.6
(−3.6) 		27.0
(−2.8) 		33.9
(1.1) 		43.5
(6.4) 		53.4
(11.9) 		63.0
(17.2) 		68.3
(20.2) 		66.6
(19.2) 		59.3
(15.2) 		47.3
(8.5) 		37.4
(3.0) 		30.3
(−0.9) 		46.3
(7.9)
Mean minimum °F (°C) 10
(−12) 		12
(−11) 		19
(−7) 		30
(−1) 		39
(4) 		50
(10) 		58
(14) 		56
(13) 		45
(7) 		33
(1) 		23
(−5) 		16
(−9) 		7
(−14)
Record low °F (°C) −14
(−26) 		−15
(−26) 		2
(−17) 		11
(−12) 		30
(−1) 		40
(4) 		48
(9) 		43
(6) 		32
(0) 		23
(−5) 		11
(−12) 		−7
(−22) 		−15
(−26)
Average precipitation inches (mm) 3.23
(82) 		2.83
(72) 		4.16
(106) 		3.51
(89) 		3.57
(91) 		4.67
(119) 		4.41
(112) 		3.98
(101) 		4.38
(111) 		3.68
(93) 		3.06
(78) 		3.85
(98) 		45.33
(1,151)
Average snowfall inches (cm) 6.1
(15) 		7.8
(20) 		3.1
(7.9) 		0.1
(0.25) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.0
(0.0) 		0.2
(0.51) 		2.9
(7.4) 		20.2
(51)
Average precipitation days (≥ 0.01 in) 10.8 10.0 11.2 11.1 11.7 11.0 10.0 8.9 8.8 8.9 8.8 10.6 121.8
Average snowy days (≥ 0.1 in) 3.5 3.5 1.7 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.2 1.7 10.7
Source: NOAA[29][30]

Economy

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Further information: Economy of Philadelphia

As of 2021, the Philadelphia-Camden-Wilmington Metropolitan Statistical Area has a gross domestic product of $477.58 billion, the tenth-largest among the nation's MSAs. The MSA's nominal gross domestic product of $431 billion is comparable to countries, such as Belgium, Iran, and Thailand.[32] Metropolitan Philadelphia is one of the top five American venture capital hubs, credited to its proximity to the New York metropolitan area and its financial and tech and biotechnology ecosystems.

At least two educational institutions, Delaware Valley Regional High School in Alexandria Township, New Jersey, and Delaware Valley College in Doylestown Township, Pennsylvania, and a now defunct local newspaper, The Delaware Valley News in Frenchtown, New Jersey, are named for the region.

Delaware Regional Planning Commission

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Main article: Delaware Valley Regional Planning Commission

The Delaware Valley Regional Planning Commission (DVRPC) serves all of the counties of the Delaware Valley MSA except for the counties in the Wilmington, DE-MD-NJ Metropolitan Division. However, in addition to the Delaware Valley, DVRPC's jurisdiction includes Mercer County, New Jersey, which OMB classifies as the Trenton-Princeton, NJ MSA and part of the larger New York-Newark CSA.[33]

Colonial history

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Further information: History of Philadelphia

The valley was the territory of the Susquehannock and Lenape, who are recalled in place names throughout the region. The region became part of the Dutch colony of New Netherland after the exploration of Delaware Bay in 1609. The Dutch called the Delaware River the Zuyd Rivier, or South River, and considered the lands along it banks and those of its bay to be the southern flank of its province of New Netherland. In 1638, it began to be settled by Swedes, Forest Finns, Dutch, and Walloons and became the colony of New Sweden, though this was not officially recognized by the Dutch Empire which re-asserted control in 1655. The area was taken by the English in 1664.[34] The name Delaware comes from Thomas West, 3rd Baron De La Warr, who had arrived at Jamestown, Virginia in 1610, just as original settlers were about to abandon it, and thus maintaining the English foothold on the North American continent. In the early 1700s, Huguenot refugees from France by way of Germany and then England began settling in the Delaware River Valley. Specifically, they left their mark in Hunterdon County, New Jersey (Frenchtown) and Bethlehem, Pennsylvania.[35]

Transportation

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See also: Transportation in Philadelphia

Many residents commute to jobs and travel in Philadelphia, Camden, Wilmington, and the surrounding suburbs with the help of expressways, trains, and buses. There are currently no transit connections to Reading, the second largest municipality in the region.

Rail

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Rapid transit

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SEPTA's Market–Frankford Line at 63rd Street Station in West Philadelphia

Light rail

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Commuter rail

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The grand concourse at Philadelphia's 30th Street Station, which serves Amtrak, SEPTA Regional Rail, and NJ Transit's Atlantic City Line

Intercity rail

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Bus service

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Transit buses

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Intercity bus

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Major highways

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Pennsylvania

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New Jersey

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Delaware

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Maryland

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Delaware River Bridges

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Benjamin Franklin Bridge, connecting Philadelphia in the west with Camden, New Jersey in the east
 
Philadelphia International Airport

Airports

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Main article: List of airports in the Delaware Valley

Major:

Secondary:

Ferry

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The Cape May–Lewes Ferry crosses the mouth of the Delaware Bay between Cape May County, New Jersey and Sussex County, Delaware; U.S. Route 9 uses this ferry.

The Riverlink Ferry operates hourly ferry service over the Delaware River between the Camden Waterfront and Penn’s Landing in Philadelphia.[37] They also operate a special event service for concerts at Freedom Mortgage Pavilion in Camden.[38]

Colleges and universities

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Parrish Hall at Swarthmore College and Cohen Hall, previously named Logan Hall, former home of the Wharton School of the University of Pennsylvania. The Wharton School is consistently ranked as the best business school in the world.[39]

Delaware

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Maryland

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New Jersey

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Pennsylvania

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Culture

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Further information: Culture of Philadelphia, Cuisine of Philadelphia, and Philadelphia English

Characteristics

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Philadelphia's Chinatown, home to many Chinese and Vietnamese restaurants
 
Hindu Temple of Delaware in Hockessin, Delaware
 
West Chester, Pennsylvania

Philadelphia's suburbs contain a high concentration of malls, the two largest of which have at least 5,000,000 square feet (460,000 m2) of office space, and at least 600,000 square feet (56,000 m2) of retail. These are the King of Prussia mall in King of Prussia, Pennsylvania, which is the largest in the U.S. (leasable sq. feet of retail space), and the Cherry Hill Mall in Cherry Hill, New Jersey, which was the first enclosed mall on the East Coast. In addition, the Christiana Mall in Newark, Delaware, is a popular destination due to its proximity to Interstate 95 and because of the availability of tax-free shopping in Delaware. Malls, office complexes, strip shopping plazas, expressways, and tract housing are common sights, and more and more continue to replace rolling countryside, farms, woods, and wetlands. However, due to strong opposition by residents and political officials, many acres of land have been preserved throughout the Delaware Valley. Older townships and large boroughs, such as Cheltenham, Norristown, Jenkintown, Upper Darby, and West Chester retain distinct community identities while engulfed in suburbia.

Mid-Atlantic American English and its subset, Philadelphia English, are two common dialects of American English in Philadelphia and the Delaware Valley.

 
Citizens Bank Park in South Philadelphia, home of the Philadelphia Phillies

Sports teams

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Further information: Sports in Philadelphia

Listing of the professional sports teams in the Delaware Valley

Media

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Main article: Media in Philadelphia

The Delaware Valley and several areas bordering it, including the Lehigh Valley, are part of the Philadelphia media market, the fourth-largest media market in the nation as of 2023.[40]

The two main newspapers are The Philadelphia Inquirer and the Philadelphia Daily News, owned by the Philadelphia Media Network. Local television channels include KYW-TV 3 (CBS), WPVI 6 (ABC), WCAU 10 (NBC), WHYY-TV 12 (PBS), WPHL-TV 17 (MyNetworkTV), WTXF 29 (FOX), WPSG 57 (CW), and WPPX 61 (Ion). Radio stations serving the area include: WRTI, WIOQ, WDAS (AM), and WTEL.

Area codes

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  • 215/267/445: The City of Philadelphia and some of its northern suburbs
  • 610/484/835: Southeastern Pennsylvania outside Philadelphia, including the western suburbs, the Lehigh Valley, and most of Berks County
  • 856: Southwestern New Jersey, including Camden, Cherry Hill, and Vineland
  • 609/640: Central and Southeastern New Jersey, including Trenton, Atlantic City and the southern Jersey Shore
  • 302: Delaware
  • 410/443/667: Eastern half of Maryland, including Cecil County
  • 717/223: South Central Pennsylvania, including Western Berks County

Politics

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See also: Politics of Pennsylvania

Philadelphia is heavily Democratic, having voted for the Democratic candidate in every presidential election since 1936. The surrounding suburban counties are key political areas in Pennsylvania, which itself is an important swing state in federal politics.[41] South Jersey has consistently voted Democratic at the presidential level in recent years, although the region is slightly more Republican-leaning than North Jersey and has voted for Republicans at the state and local level.[42] New Castle County's Democratic lean and large share of Delaware's population has tended to make Delaware as a whole vote for Democrats, while the less populous Kent County is more competitive.[43] Recent well-known political figures from the Greater Philadelphia area include current U.S. President Joe Biden, former Pennsylvania Governor Ed Rendell and late former U.S. Senator Arlen Specter.

Congressional districts

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The following congressional districts of the United States House of Representatives are located partly or entirely in the Delaware Valley CSA. Italicized counties are not part of the CSA.

District Incumbent
District PVI Incumbent Party Counties
DE-AL D+6 Lisa Blunt Rochester D Kent, New Castle, and Sussex
MD-1 R+14 Andy Harris R Baltimore, Caroline, Carroll, Cecil, Dorchester, Harford, Kent, Queen Anne's, Somerset, Talbot, Wicomico, and Worcester
NJ-1 D+13 Donald Norcross D Burlington, Camden, and Gloucester
NJ-2 R+1 Jeff Van Drew R Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester, Ocean, and Salem
NJ-3 R+2 Andy Kim D Burlington and Ocean
PA-1 R+1 Brian Fitzpatrick R Bucks and Montgomery
PA-2 D+25 Brendan Boyle D Philadelphia
PA-3 D+41 Dwight Evans D Philadelphia
PA-4 D+7 Madeleine Dean D Berks and Montgomery
PA-5 D+13 Mary Gay Scanlon D Delaware, Montgomery, and Philadelphia
PA-6 D+2 Chrissy Houlahan D Berks and Chester
PA-9 R+14 Dan Meuser R Berks, Carbon, Columbia, Lebanon, Luzerne, Montour, Northumberland, and Schuylkill

Additionally, the Delaware Valley is represented in the United States Senate by the eight Senators from Delaware, Maryland, New Jersey, and Pennsylvania.

See also

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Notes

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  1. ^ The OMB classifies Trenton and Mercer County as part of the NYC Metropolitan Area
  2. ^ Mean monthly maxima and minima (i.e. the highest and lowest temperature readings during an entire month or year) calculated based on data at said location from 1991 to 2020.
  3. ^ Official temperature and precipitation measurements for Philadelphia were taken at the Weather Bureau Office in downtown from January 1872 to 19 June 1940, and at Philadelphia Int'l from 20 June 1940 to the present.[17] Snowfall and snow depth records date to 1 January 1884 and 1 October 1948, respectively.[18] In 2006, snowfall measurements were moved to National Park, New Jersey directly across the Delaware River from the airport.[19]
  4. ^ Mean monthly maxima and minima (i.e. the highest and lowest temperature readings during an entire month or year) calculated based on data at said location from 1991 to 2020.
  5. ^ The official climatology station for Atlantic City was at the Weather Bureau Office downtown from January 1874 to 15 June 1958 and Atlantic City Int'l (ACY) in Egg Harbor Township since 16 June 1958.[23] ACY's location in the Pine Barrens and distance away from the coast and urban heat island of downtown Atlantic City largely account for its markedly colder temperatures at night as compared to downtown; for example, from 1959 to 2013, there were 50 days with a low of 0 °F (−18 °C) or lower, while in the same period, the corresponding number of days at downtown was 2. The National Weather Service ceased regular snowfall observations at downtown after the winter of 1958–59.

References

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  1. ^ "Welsh Mountain". Retrieved May 5, 2016.
  2. ^ "MyTopo – Welsh Mountain area". Retrieved May 5, 2016.
  3. ^ a b "Total Gross Domestic Product for Philadelphia-Camden-Wilmington, PA-NJ-DE-MD (MSA)". fred.stlouisfed.org.
  4. ^ "Words and Their Stories: Nicknames for Philadelphia and Boston". Voice of America. April 3, 2010. Retrieved July 11, 2017.
  5. ^ Tucker, Laura (November 25, 2014). "Philadelphia". QS Quacquarelli Symonds Limited. Retrieved October 11, 2015.
  6. ^ Eramian, Daniel (November 2, 2020). "Is Philadelphia's biotech cluster faltering? Experts say no". STAT. Retrieved October 24, 2021.
  7. ^ "Q2 2024". PitchBook-NVCA Venture Monitor. July 11, 2024. Retrieved July 11, 2024.
  8. ^ Jon Hurdle (May 13, 2021). "Report details surge in warehouse construction…". NJ Spotlight News. Archived from the original on July 9, 2023. Retrieved January 3, 2023. In South Jersey, the area has become the "epicenter" of warehouse construction in the greater Philadelphia region..'Activity in the Southern New Jersey industrial market continues to amaze,' the report said.
  9. ^ "Annual Estimates of the Resident Population: April 1, 2010 to July 1, 2016". United States Census Bureau. Archived from the original on February 14, 2020. Retrieved December 30, 2017.
  10. ^ "Census 2000 PHC-T-29. Ranking Tables for Population of Metropolitan Statistical Areas, Micropolitan Statistical Areas, Combined Statistical Areas, New England City and Town Areas, and Combined New England City and Town Areas: 1990 and 2000" Table 7, released December 30, 2003. Accessed April 22, 2019.
  11. ^ Office of Management and Budget Bulletin 13-01, February 28, 2013, accessed on April 22, 2019, at URL https://www.bls.gov/bls/omb-bulletin-13-01-revised-delineations-of-metropolitan-statistical-areas.pdf
  12. ^ Bond, Michaelle (November 7, 2017). "In historic win, Delco Dems take council seats". Philly.com. Retrieved January 5, 2018.
  13. ^ Stirling, Steven (April 24, 2015). "Here are the North, Central, and South Jersey borders as determined by you (INTERACTIVE)". NJ.com. Retrieved January 5, 2018.
  14. ^ "Delaware River Region". Visit NJ.
  15. ^ Singer, Audrey; Vitiello, Domenic; Katz, Michael; Park, David. "Recent Immigration to Philadelphia: Regional Change in a Re-Emerging Gateway" (PDF). Metropolitan Policy Program at Brookings. Brookings Institution.
  16. ^ "Community Facts". American FactFinder. United States Census Bureau. Retrieved January 4, 2018.
  17. ^ ThreadEx; search for location= "PA - Philadelphia", variable= "Station thread"
  18. ^ a b "NowData – NOAA Online Weather Data". National Oceanic and Atmospheric Administration. Retrieved April 13, 2016.
  19. ^ Wood, Anthony R. "Snow total at airport gets a boost A new measuring station and technique likely contributed to two 8-inch-plus readings". Philly.com. The Inquirer. Archived from the original on July 28, 2014. Retrieved June 10, 2014.
  20. ^ "Summary of Monthly Normals 1991–2020". National Oceanic and Atmospheric Administration. Retrieved June 13, 2021.
  21. ^ "WMO Climate Normals for PHILADELPHIA/INT'L ARPT PA 1961–1990". National Oceanic and Atmospheric Administration. Retrieved July 18, 2020.
  22. ^ a b "Philadelphia, Pennsylvania, USA - Monthly weather forecast and Climate data". Weather Atlas. Retrieved May 17, 2019.
  23. ^ Threadex
  24. ^ "NowData – NOAA Online Weather Data". National Oceanic and Atmospheric Administration. Retrieved August 11, 2021.
  25. ^ "Station: ATLANTIC CITY INTL AP, NJ". U.S. Climate Normals 2020: U.S. Monthly Climate Normals (1991–2020). National Oceanic and Atmospheric Administration. Archived from the original on June 8, 2024. Retrieved August 11, 2021.
  26. ^ "WMO Climate Normals for ATLANTIC CITY, NJ 1961–1990". National Oceanic and Atmospheric Administration. Archived from the original on June 8, 2024. Retrieved August 11, 2021.
  27. ^ "Historical UV Index Data - Atlantic City, NJ". UV Index Today. Retrieved April 22, 2023.
  28. ^ Average weather for Doylestown Weather Channel Retrieved May 12, 2008
  29. ^ a b c "NowData - NOAA Online Weather Data". National Oceanic and Atmospheric Administration. Retrieved January 30, 2023.
  30. ^ a b c "Station: Dover, DE". U.S. Climate Normals 2020: U.S. Monthly Climate Normals (1991-2020). National Oceanic and Atmospheric Administration. Retrieved June 18, 2021.
  31. ^ "Dover, Delaware, USA – Monthly weather forecast and Climate data". Weather Atlas. Archived from the original on June 29, 2019. Retrieved July 4, 2019.
  32. ^ "Local Television Market Universe Estimates" (PDF). Nielsen. The Nielsen Company. September 24, 2016. Retrieved April 11, 2017.
  33. ^ "Greater Philadelphia Economic Development Framework" (PDF). September 2009. Retrieved January 5, 2018.
  34. ^ *Family Search.com: Map of Delaware Valley in 17th century showing forts & settlements with date of founding
  35. ^ Calvin, Claude (1945). The Calvin Families. University of Wisconsin. pp. 47–53, 57–71.
  36. ^ "New Hope-Lambertville Route 202 Toll Bridge". Delaware River Joint Toll Brice Commission. Archived from the original on February 25, 2015.
  37. ^ "General Service – Riverlink Ferry". Retrieved November 21, 2023.
  38. ^ "Concert Service – Riverlink Ferry". Retrieved November 21, 2023.
  39. ^ "The 50 best business schools in the world". Business Insider.
  40. ^ "PHILADELPHIA DESIGNATED MARKET DATA". TruckAds. Retrieved January 4, 2018.
  41. ^ Cohen, Micah (October 29, 2012). "In Pennsylvania, the Democratic Lean Is Slight, but Durable". The New York Times. Retrieved January 5, 2018.
  42. ^ Cohen, Micah (July 14, 2012). "In Blue New Jersey, Red Spots May Be Sign of the Past". FiveThirtyEight. Retrieved January 5, 2018.
  43. ^ Cohen, Micah (August 31, 2012). "Delaware: A Small Example of a Larger Trend". FiveThirtyEight. Retrieved January 5, 2018.

Further reading

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  • Jean R. Soderlund, Lenape Country: Delaware Valley Society before William Penn. Philadelphia: University of Pennsylvania Press, 2014.
  • Mark L. Thompson, The Contest for the Delaware Valley: Allegiance, Identity, and Empire in the Seventeenth Century. Baton Rouge, LA: Louisiana State University Press, 2013.
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Wikivoyage has a travel guide for Delaware Valley.
 
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39°52′37″N 75°19′23″W / 39.877°N 75.323°W / 39.877; -75.323

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