Weather on September 11
Philadelphia, PA
55 Years of Data
Avg High
80°F
Avg Low
65°F
Warmest
1983
90°F avg
Coldest
1993
61°F avg
About This Date
September 11th in Philadelphia, PA typically brings warm fall weather, with average highs around 80°F and lows near 65°F. Over 55 years of records, the warmest September 11th was in 1983 (90°F average), while the coldest was 1993 (61°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 15% of September 11th dates historically, with the wettest September 11th recording 7.11" 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 11th in Philadelphia, PA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 75° | 64° | 70° | — | — |
| 2024 | 83° | 62° | 72° | — | — |
| 2023 | 82° | 69° | 76° | — | — |
| 2022 | 84° | 72° | 78° | — | — |
| 2021 | 81° | 60° | 70° | — | — |
| 2020 | 85° | 73° | 79° | 0.97" | — |
| 2019 | 85° | 69° | 77° | — | — |
| 2018 | 69° | 61° | 65° | 0.51" | — |
| 2017 | 75° | 54° | 64° | — | — |
| 2016 | — | 79° | — | — | — |
| 2015 | 76° | 67° | 71° | 7.11" | — |
| 2014 | 82° | 68° | 75° | — | — |
| 2013 | 88° | 75° | 81° | — | — |
| 2012 | 76° | 57° | 66° | — | — |
| 2011 | 78° | 64° | 71° | 3.1" | — |
| 2010 | 75° | 59° | 67° | — | — |
| 2009 | 66° | 59° | 63° | 1.32" | — |
| 2008 | 75° | 66° | 71° | — | — |
| 2007 | 77° | 72° | 74° | 0.25" | — |
| 2006 | 78° | 56° | 67° | — | — |
| 2005 | 88° | 64° | 76° | — | — |
| 2004 | 76° | 65° | 70° | — | — |
| 2003 | 82° | 62° | 72° | — | — |
| 2002 | 82° | 68° | 75° | — | — |
| 2001 | 84° | 63° | 73° | — | — |
| 2000 | 84° | 68° | 76° | — | — |
| 1999 | 81° | 64° | 72° | — | — |
| 1998 | 83° | 66° | 74° | — | — |
| 1997 | 77° | 70° | 73° | 1.09" | — |
| 1996 | 75° | 68° | 72° | — | — |
| 1995 | 77° | 54° | 65° | — | — |
| 1994 | 75° | 53° | 64° | — | — |
| 1993coldest | 70° | 52° | 61° | — | — |
| 1992 | 77° | 60° | 69° | — | — |
| 1991 | 81° | 66° | 73° | — | — |
| 1990 | 86° | 69° | 78° | — | — |
| 1989 | 89° | 74° | 81° | — | — |
| 1988 | 74° | 63° | 68° | — | — |
| 1987 | 84° | 69° | 77° | — | — |
| 1986 | 85° | 67° | 76° | — | — |
| 1985 | 76° | 62° | 69° | — | — |
| 1984 | 80° | 68° | 74° | — | — |
| 1983warmest | 101° | 79° | 90° | — | — |
| 1982 | 88° | 66° | 77° | — | — |
| 1981 | 85° | 67° | 76° | — | — |
| 1980 | 81° | 60° | 70° | — | — |
| 1979 | 80° | 63° | 71° | — | — |
| 1978 | 82° | 66° | 74° | — | — |
| 1977 | 72° | 60° | 66° | — | — |
| 1976 | 77° | 54° | 65° | — | — |
| 1975 | 75° | 61° | 68° | 0.05" | — |
| 1974 | 80° | 72° | 76° | — | — |
| 1973 | 84° | 61° | 72° | — | — |
| 1972 | 75° | 57° | 66° | — | — |
| 1971 | 82° | 67° | 74° | — | — |
55 years of data from PHILADELPHIA CITY