Weather on September 1
Philadelphia, PA
55 Years of Data
Avg High
84°F
Avg Low
67°F
Warmest
2010
88°F avg
Coldest
2006
63°F avg
About This Date
September 1st in Philadelphia, PA typically brings warm fall weather, with average highs around 84°F and lows near 67°F. Over 55 years of records, the warmest September 1st was in 2010 (88°F average), while the coldest was 2006 (63°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 20% of September 1st dates historically, with the wettest September 1st recording 3.68" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for September 1st in Philadelphia, PA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 80° | 62° | 71° | — | — |
| 2024 | 85° | 73° | 79° | — | — |
| 2023 | 80° | 62° | 71° | — | — |
| 2022 | 86° | 69° | 78° | — | — |
| 2021 | 88° | 67° | 77° | 1.02" | — |
| 2020 | 77° | 69° | 73° | — | — |
| 2019 | 87° | 67° | 77° | — | — |
| 2018 | 98° | 70° | 84° | 1.17" | — |
| 2017 | 87° | 66° | 77° | — | — |
| 2016 | — | 73° | — | 0.51" | — |
| 2015 | 91° | 74° | 82° | 0.15" | — |
| 2014 | 93° | 74° | 83° | 1.78" | — |
| 2013 | 88° | 75° | 81° | — | — |
| 2012 | 93° | 72° | 82° | — | — |
| 2011 | 83° | 66° | 74° | — | — |
| 2010warmest | 97° | 80° | 88° | — | — |
| 2009 | 76° | 58° | 67° | — | — |
| 2008 | 87° | 67° | 77° | — | — |
| 2007 | 81° | 61° | 71° | — | — |
| 2006coldest | 67° | 60° | 63° | 3.45" | — |
| 2005 | 89° | 70° | 79° | — | — |
| 2004 | 85° | 65° | 75° | — | — |
| 2003 | 78° | 70° | 74° | 3.68" | — |
| 2002 | 68° | 61° | 64° | 2.21" | — |
| 2001 | 84° | 65° | 74° | — | — |
| 2000 | 88° | 75° | 81° | 0.15" | — |
| 1999 | 81° | 67° | 74° | — | — |
| 1998 | 88° | 70° | 79° | — | — |
| 1997 | 89° | 72° | 80° | — | — |
| 1996 | 86° | 64° | 75° | — | — |
| 1995 | 89° | 75° | 82° | — | — |
| 1994 | 84° | 66° | 75° | — | — |
| 1993 | 90° | 73° | 81° | — | — |
| 1992 | 77° | 62° | 70° | — | — |
| 1991 | 74° | 59° | 66° | — | — |
| 1990 | 84° | 69° | 77° | — | — |
| 1989 | 84° | 69° | 77° | — | — |
| 1988 | 83° | 63° | 73° | — | — |
| 1987 | 74° | 63° | 68° | — | — |
| 1986 | 78° | 61° | 69° | — | — |
| 1985 | 78° | 62° | 70° | — | — |
| 1984 | 78° | 67° | 72° | — | — |
| 1983 | 88° | 69° | 78° | — | — |
| 1982 | 78° | 69° | 74° | — | — |
| 1981 | 81° | 68° | 74° | — | — |
| 1980 | 96° | 76° | 86° | — | — |
| 1979 | 84° | 66° | 75° | — | — |
| 1978 | 77° | 62° | 70° | 0.61" | — |
| 1977 | 87° | 70° | 78° | — | — |
| 1976 | 83° | 62° | 72° | — | — |
| 1975 | 72° | 61° | 66° | — | — |
| 1974 | 89° | 73° | 81° | 0.58" | — |
| 1973 | 93° | 73° | 83° | — | — |
| 1972 | 82° | 66° | 74° | — | — |
| 1971 | 77° | 62° | 70° | — | — |
55 years of data from PHILADELPHIA CITY