Philadelphia, PA Climate

Summary Graph

The summary climate graph for Philadelphia, PA shows a selection of temperature, rainfall and snow minimum, mean and maximum measures over the course of a year. Click on each of the measures in the key to toggle them on and off.

Graph of average and extreme temperature ranges by day for Philadelphia, PA.


The warmest month in Philadelphia International, Philadelphia, Pennsylvania is July with an average high temperature of 88.4°F. The hottest day on record was July 24 2010 when the temperature hit 105.1°F. During January the overnight temperature drops to an average of 24.5°F with the lowest temperature of -7.1°F being recorded on January 18 1982.

Warmest Days

Warmest Months

Coldest Days

Coldest Months

The warmest days on record are:

24 Jul 2010105.1°F
18 Jul 1999103.1°F
15 Jul 1995102.9°F
23 Jul 2011102.9°F
18 Jul 1988102°F

The warmest months on average were:

July 201193.9°F
July 198893.4°F
July 201093.1°F
July 201292.9°F
July 199492.5°F

The coldest days on record are:

18 Jan 1982-7.1°F
23 Jan 1984-7.1°F
21 Jan 1985-6.2°F
20 Jan 1994-5.1°F
18 Jan 1977-4°F

The coldest months on average were:

January 197710.7°F
February 197914.7°F
February 197815.6°F
January 198215.6°F
December 198916.2°F


The wettest month in Philadelphia, PA is May with an average of 4.6 inches of rain falling on 12 to 13 days. The driest month in Philadelphia, PA is February with an average of 2.9 inches of rain falling on 8 to 9 days.

Wettest Days

The wettest days on record are:

23 April 197313.8 inches
16 April 20073.6 inches
17 April 20113.1 inches
16 April 19832.7 inches
16 April 19862 inches

Wettest Months

The wettest months on record are:

April 197327.4 inches
May 197322.3 inches
August 201120.6 inches
March 197317.2 inches
January 197315.3 inches

Driest Months

The driest months on record are:

September 20050.2 inches
November 19760.6 inches
September 20070.6 inches
November 20010.6 inches
February 20020.7 inches