Weather on September 12
Philadelphia, PA
55 Years of Data
Avg High
81°F
Avg Low
64°F
Warmest
2019
82°F avg
Coldest
1992
63°F avg
About This Date
September 12th in Philadelphia, PA typically brings warm fall weather, with average highs around 81°F and lows near 64°F. Over 55 years of records, the warmest September 12th was in 2019 (82°F average), while the coldest was 1992 (63°F) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 20% of September 12th dates historically, with the wettest September 12th recording 1.88" 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 12th in Philadelphia, PA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 84° | 61° | 72° | — | — |
| 2024 | 83° | 64° | 73° | — | — |
| 2023 | 86° | 68° | 77° | — | — |
| 2022 | 76° | 71° | 73° | — | — |
| 2021 | 81° | 60° | 70° | — | — |
| 2020 | 79° | 63° | 71° | — | — |
| 2019warmest | 91° | 74° | 82° | — | — |
| 2018 | 76° | 66° | 71° | 0.13" | — |
| 2017 | 80° | 56° | 68° | — | — |
| 2016 | 86° | 71° | 79° | — | — |
| 2015 | 83° | 69° | 76° | — | — |
| 2014 | 84° | 62° | 73° | — | — |
| 2013 | 88° | 74° | 81° | — | — |
| 2012 | 76° | 55° | 65° | — | — |
| 2011 | 84° | 65° | 74° | — | — |
| 2010 | 80° | 62° | 71° | 0.61" | — |
| 2009 | 69° | 63° | 66° | 0.08" | — |
| 2008 | 76° | 69° | 72° | 1.75" | — |
| 2007 | 75° | 64° | 70° | 1.02" | — |
| 2006 | 71° | 59° | 65° | — | — |
| 2005 | 94° | 66° | 80° | — | — |
| 2004 | 83° | 59° | 71° | — | — |
| 2003 | 73° | 65° | 69° | 0.99" | — |
| 2002 | 78° | 60° | 69° | — | — |
| 2001 | 83° | 63° | 73° | — | — |
| 2000 | 86° | 70° | 78° | 1.07" | — |
| 1999 | 86° | 62° | 74° | — | — |
| 1998 | 92° | 68° | 80° | — | — |
| 1997 | 84° | 65° | 74° | — | — |
| 1996 | 72° | 66° | 69° | — | — |
| 1995 | 82° | 58° | 70° | — | — |
| 1994 | 73° | 54° | 63° | — | — |
| 1993 | 75° | 51° | 63° | — | — |
| 1992coldest | 72° | 54° | 63° | — | — |
| 1991 | 75° | 58° | 66° | — | — |
| 1990 | 84° | 70° | 77° | — | — |
| 1989 | 78° | 70° | 74° | — | — |
| 1988 | 77° | 58° | 67° | — | — |
| 1987 | 72° | 69° | 70° | — | — |
| 1986 | 85° | 69° | 77° | — | — |
| 1985 | 73° | 55° | 64° | — | — |
| 1984 | 80° | 68° | 74° | — | — |
| 1983 | 91° | 69° | 80° | — | — |
| 1982 | 90° | 66° | 78° | — | — |
| 1981 | 88° | 72° | 80° | — | — |
| 1980 | 89° | 65° | 77° | — | — |
| 1979 | 80° | 56° | 68° | — | — |
| 1978 | 85° | 61° | 73° | 1.88" | — |
| 1977 | 76° | 54° | 65° | — | — |
| 1976 | 85° | 61° | 73° | — | — |
| 1975 | 79° | 57° | 68° | 1.19" | — |
| 1974 | 84° | 68° | 76° | 0.23" | — |
| 1973 | 81° | 63° | 72° | — | — |
| 1972 | 72° | 64° | 68° | 0.25" | — |
| 1971 | 82° | 72° | 77° | — | — |
55 years of data from PHILADELPHIA CITY