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Philadelphia, PA - International Airport (39.88°N 75.25°W)

You have reached the climate summary page for Philadelphia, Pennsylvania. All data here is averaged and is not intended as a forecast for a specific time period. The local forecast for Delaware County can be found here.

Average High Temperature

(1948-1993)

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
°C 4.0 5.6 10.5 17.2 22.9 27.7 30.2 29.2 25.2 19.2 12.8 6.4 17.6
°F 39.2 42.1 50.9 63.0 73.2 81.9 86.4 84.6 77.4 66.6 55.0 43.5 63.7


Average Low Temperature

(1948-1993)

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
°C -4.2 -3.3 0.6 5.9 11.6 16.5 19.7 19.0 14.8 8.3 3.1 -1.9 7.5
°F 24.4 26.1 33.1 42.6 52.9 61.7 67.5 66.2 58.6 46.9 37.6 28.6 45.5


Average Temperature

(1962-1993)

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
°C 1.4 2.4 7.1 12.6 18.4 22.8 25.5 24.6 20.6 14.8 9.7 3.6 13.5
°F 34.5 36.3 44.8 54.7 65.1 73.0 77.9 76.3 69.1 58.6 49.5 38.5 56.3


Heating Degree Days

(1961-1990)

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
°C 596 497 389 210 68 2 0 0 17 157 310 502 2752
°F 1073 895 700 378 122 4 0 0 31 283 558 904 4954


Cooling Degree Days

(1961-1990)

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
°C 0 0 0 0 32 116 201 181 71 9 0 0 611
°F 0 0 0 0 58 209 362 326 128 16 0 0 1100


Average Precipitation

(1948-1995)

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
mm 81.6 70.4 94.6 87.8 93.6 86.6 108.1 96.9 85.9 66.7 84.9 86.4 1044.7
inches 3.22.83.73.53.73.44.33.83.42.63.33.441.1


All data on this page thanks to World Climate.

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