Weather on September 1
Philadelphia, PA
55 Years of Data
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.
| 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° | — | — |
Philadelphia, PA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Philadelphia, PA Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Philadelphia, PA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Philadelphia, PA
Philadelphia, PA has no months that meet our "pleasant" threshold — every season has tradeoffs.