Weather on October 21
Philadelphia, PA
55 Years of Data
About This Date
October 21st in Philadelphia, PA typically brings mild fall weather, with average highs around 66°F and lows near 49°F. Over 54 years of records, the warmest October 21st was in 1984 (75°F average), while the coldest was 1974 (41°F) — a 34°F range across recorded history. Rain or other precipitation has occurred on about 19% of October 21st dates historically, with the wettest October 21st recording 3.56" of rain. The last decade has been 5.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.3°F warmer on this date compared to 20-30 years ago.
Planning for October 21st in Philadelphia, PA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 77° | 50° | 64° | — | — |
| 2024 | 79° | 53° | 66° | — | — |
| 2023 | 70° | 57° | 63° | 0.13" | — |
| 2022 | 62° | 44° | 53° | — | — |
| 2021 | 78° | 58° | 68° | — | — |
| 2020 | 73° | 58° | 65° | — | — |
| 2019 | 55° | 50° | 53° | 3.56" | — |
| 2018 | 66° | 44° | 55° | 0.2" | — |
| 2016 | 80° | 64° | 72° | — | — |
| 2015 | 69° | 50° | 60° | — | — |
| 2014 | 63° | 47° | 55° | — | — |
| 2013 | 64° | 49° | 56° | — | — |
| 2012 | 67° | 52° | 59° | — | — |
| 2011 | 58° | 45° | 51° | — | — |
| 2010 | 61° | 50° | 55° | — | — |
| 2009 | 75° | 55° | 65° | — | — |
| 2008 | 62° | 38° | 50° | — | — |
| 2007 | 78° | 52° | 65° | — | — |
| 2006 | 59° | 44° | 52° | — | — |
| 2005 | 54° | 52° | 53° | 1.12" | — |
| 2004 | 55° | 50° | 53° | 0.23" | — |
| 2003 | 70° | 57° | 63° | 0.05" | — |
| 2002 | 62° | 52° | 57° | — | — |
| 2001 | 77° | 54° | 65° | — | — |
| 2000 | 76° | 55° | 65° | — | — |
| 1999 | 62° | 45° | 53° | — | — |
| 1998 | 61° | 49° | 55° | — | — |
| 1997 | 58° | 47° | 52° | — | — |
| 1996 | 60° | 44° | 52° | 0.53" | — |
| 1995 | 75° | 46° | 61° | 1.52" | — |
| 1994 | 68° | 55° | 62° | 0.05" | — |
| 1993 | 76° | 56° | 66° | 0.61" | — |
| 1992 | 64° | 46° | 55° | — | — |
| 1991 | 60° | 44° | 52° | — | — |
| 1990 | 68° | 46° | 57° | — | — |
| 1989 | 53° | 41° | 47° | — | — |
| 1988 | 55° | 44° | 50° | — | — |
| 1987 | 61° | 44° | 52° | — | — |
| 1986 | 72° | 49° | 60° | — | — |
| 1985 | 62° | 52° | 57° | — | — |
| 1984warmest | 86° | 65° | 75° | — | — |
| 1983 | 60° | 43° | 51° | — | — |
| 1982 | 61° | 47° | 54° | — | — |
| 1981 | 70° | 48° | 59° | — | — |
| 1980 | 70° | 50° | 60° | — | — |
| 1979 | 82° | 63° | 72° | — | — |
| 1978 | 69° | 47° | 58° | — | — |
| 1977 | 69° | 47° | 58° | — | — |
| 1976 | 58° | 46° | 52° | — | — |
| 1975 | 72° | 48° | 60° | — | — |
| 1974coldest | 49° | 33° | 41° | — | — |
| 1973 | 56° | 51° | 53° | — | — |
| 1972 | 53° | 32° | 43° | — | — |
| 1971 | 72° | 54° | 63° | — | — |
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.