Weather on September 23
Philadelphia, PA
55 Years of Data
Avg High
75°F
Avg Low
59°F
Warmest
2005
82°F avg
Coldest
1974
53°F avg
About This Date
September 23rd in Philadelphia, PA typically brings pleasant fall weather, with average highs around 75°F and lows near 59°F. Over 55 years of records, the warmest September 23rd was in 2005 (82°F average), while the coldest was 1974 (53°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 25% of September 23rd dates historically, with the wettest September 23rd recording 6.4" of rain. The last decade has been 2.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.1°F warmer on this date compared to 20-30 years ago.
Planning for September 23rd in Philadelphia, PA? Great weather for outdoor activities.
Warming Trend
1.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 79° | 63° | 71° | — | — |
| 2024 | 78° | 62° | 70° | — | — |
| 2023 | 73° | 57° | 65° | — | — |
| 2022 | 81° | 52° | 66° | — | — |
| 2021 | 85° | 74° | 79° | — | — |
| 2020 | 75° | 48° | 62° | — | — |
| 2019 | 90° | 66° | 78° | — | — |
| 2018 | 76° | 59° | 67° | 0.2" | — |
| 2017 | 84° | 69° | 77° | — | — |
| 2016 | 86° | 66° | 76° | — | — |
| 2015 | 72° | 59° | 65° | — | — |
| 2014 | 71° | 51° | 61° | — | — |
| 2013 | 69° | 51° | 60° | — | — |
| 2012 | 85° | 61° | 73° | 2.64" | — |
| 2011 | 75° | 69° | 72° | 6.27" | — |
| 2010 | 89° | 65° | 77° | 0.13" | — |
| 2009 | 83° | 72° | 77° | 0.51" | — |
| 2008 | 73° | 56° | 64° | — | — |
| 2007 | 81° | 68° | 74° | — | — |
| 2006 | 80° | 67° | 73° | 0.23" | — |
| 2005warmest | 93° | 71° | 82° | — | — |
| 2004 | 86° | 68° | 77° | — | — |
| 2003 | 75° | 64° | 70° | 0.2" | — |
| 2002 | 79° | 65° | 72° | — | — |
| 2001 | 84° | 66° | 75° | — | — |
| 2000 | 69° | 62° | 66° | 0.28" | — |
| 1999 | 74° | 50° | 62° | — | — |
| 1998 | 68° | 55° | 62° | — | — |
| 1997 | 70° | 53° | 61° | — | — |
| 1996 | 68° | 58° | 63° | 0.25" | — |
| 1995 | 62° | 52° | 57° | 1.7" | — |
| 1994 | 66° | 59° | 63° | 2.59" | — |
| 1993 | 75° | 54° | 64° | — | — |
| 1992 | 71° | 51° | 61° | — | — |
| 1991 | 68° | 57° | 63° | — | — |
| 1990 | 66° | 53° | 60° | — | — |
| 1989 | 80° | 48° | 64° | — | — |
| 1988 | 86° | 64° | 75° | — | — |
| 1987 | 71° | 56° | 63° | — | — |
| 1986 | 86° | 64° | 75° | — | — |
| 1985 | 75° | 68° | 72° | — | — |
| 1984 | 84° | 66° | 75° | — | — |
| 1983 | 66° | 50° | 58° | — | — |
| 1982 | 68° | 57° | 63° | — | — |
| 1981 | 62° | 52° | 57° | — | — |
| 1980 | 86° | 64° | 75° | — | — |
| 1979 | 70° | 52° | 61° | — | — |
| 1978 | 71° | 56° | 63° | — | — |
| 1977 | 70° | 59° | 64° | 0.3" | — |
| 1976 | 77° | 53° | 65° | — | — |
| 1975 | 62° | 57° | 60° | 6.4" | — |
| 1974coldest | 58° | 48° | 53° | — | — |
| 1973 | 83° | 67° | 75° | 0.28" | — |
| 1972 | 71° | 50° | 61° | — | — |
| 1971 | 67° | 64° | 65° | — | — |
55 years of data from PHILADELPHIA WSFO