All-time weather records — Philadelphia, PA

Record high
104.0°F
July 5, 1999
Record low
-5.1°F
January 19, 1994
Wettest day
9.60 in
May 15, 2006

Climate change signal in Philadelphia

36.3%

of Philadelphia's all-time daily heat records were set in the last decade (133 of 366 records since 2015).

26.5%

of all-time daily cold records were set in the last decade (97 of 366 records since 2015).

If records were spread evenly across the station's history, you'd expect roughly 5% per decade. Decade-by-decade, here's where each record-breaking day was set:

Decade Heat records set # Cold records set #
1990s
67
111
2000s
127
109
2010s
102
109
2020s
70
37

Records are the all-time daily extremes that are still standing — each daily record can only be held by one year. The station's earliest hot record was set in 1993, the latest in 2025. Period of observation: 1993-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 73.0°F — Jan 29, 2002 -5.1°F — Jan 19, 1994 2.47 in — Jan 23, 1998
February 78.1°F — Feb 22, 2018 1.0°F — Feb 20, 2015 2.28 in — Feb 17, 2003
March 90.0°F — Mar 30, 1998 10.0°F — Mar 1, 2014 2.67 in — Mar 23, 2024
April 98.1°F — Apr 17, 2002 25.0°F — Apr 6, 1995 3.20 in — Apr 16, 2018
May 98.1°F — May 29, 2006 39.9°F — May 13, 1996 9.60 in — May 15, 2006
June 102.9°F — Jun 25, 2025 50.0°F — Jun 1, 2021 4.20 in — Jun 26, 2006
July 104.0°F — Jul 5, 1999 57.0°F — Jul 2, 2001 5.10 in — Jul 12, 2004
August 102.9°F — Aug 4, 2005 53.1°F — Aug 6, 1994 5.73 in — Aug 27, 2011
September 99.0°F — Sep 8, 2023 44.1°F — Sep 20, 1993 7.50 in — Sep 28, 2004
October 95.0°F — Oct 3, 2019 30.9°F — Oct 30, 2008 5.10 in — Oct 8, 2005
November 82.9°F — Nov 1, 2024 19.9°F — Nov 24, 2018 2.85 in — Nov 28, 1993
December 73.0°F — Dec 7, 1998 6.1°F — Dec 24, 2022 3.29 in — Dec 14, 1996

Click a month to see every daily record for that month in Philadelphia.