Weather on April 21
Philadelphia, PA
55 Years of Data
Avg High
69°F
Avg Low
50°F
Warmest
1976
74°F avg
Coldest
1981
45°F avg
About This Date
April 21st in Philadelphia, PA typically brings mild spring weather, with average highs around 69°F and lows near 50°F. Over 53 years of records, the warmest April 21st was in 1976 (74°F average), while the coldest was 1981 (45°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 19% of April 21st dates historically, with the wettest April 21st recording 1.88" of rain. The last decade has been 2.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.8°F warmer on this date compared to 20-30 years ago.
Planning for April 21st in Philadelphia, PA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 72° | 56° | 64° | — | — |
| 2024 | 71° | 43° | 57° | — | — |
| 2023 | 80° | 52° | 66° | — | — |
| 2022 | 62° | 47° | 54° | — | — |
| 2021 | 76° | 50° | 63° | — | — |
| 2019 | 74° | 63° | 68° | 0.1" | — |
| 2018 | 55° | 39° | 47° | — | — |
| 2017 | 77° | 54° | 65° | 0.61" | — |
| 2016 | 73° | 49° | 61° | — | — |
| 2015 | 78° | 52° | 65° | 1.73" | — |
| 2014 | 59° | 42° | 51° | — | — |
| 2013 | 61° | 38° | 49° | — | — |
| 2012 | 77° | 57° | 67° | — | — |
| 2011 | 83° | 48° | 65° | — | — |
| 2010 | 70° | 52° | 61° | — | — |
| 2009 | 71° | 50° | 61° | 0.48" | — |
| 2008 | 66° | 51° | 59° | — | — |
| 2007 | 77° | 47° | 62° | — | — |
| 2006 | 68° | 48° | 58° | 1.57" | — |
| 2005 | 70° | 51° | 60° | — | — |
| 2004 | 72° | 54° | 63° | — | — |
| 2003 | 73° | 49° | 61° | — | — |
| 2002 | 58° | 47° | 52° | 0.86" | — |
| 2000 | 55° | 48° | 52° | 1.88" | — |
| 1999 | 60° | 43° | 51° | 0.41" | — |
| 1998 | 72° | 47° | 59° | — | — |
| 1997 | 61° | 42° | 51° | 0.1" | — |
| 1996 | 80° | 63° | 71° | — | — |
| 1995 | 72° | 56° | 64° | — | — |
| 1994 | 66° | 50° | 58° | — | — |
| 1993 | 70° | 55° | 62° | — | — |
| 1992 | 77° | 54° | 65° | — | — |
| 1991 | 49° | 42° | 45° | — | — |
| 1990 | 65° | 56° | 60° | — | — |
| 1989 | 65° | 55° | 60° | — | — |
| 1988 | 58° | 45° | 51° | — | — |
| 1987 | 77° | 60° | 69° | — | — |
| 1986 | 66° | 56° | 61° | — | — |
| 1985 | 89° | 55° | 72° | — | — |
| 1984 | 66° | 49° | 57° | — | — |
| 1983 | 61° | 40° | 50° | — | — |
| 1982 | 64° | 49° | 56° | — | — |
| 1981coldest | 54° | 36° | 45° | — | — |
| 1980 | 74° | 58° | 66° | — | — |
| 1979 | 72° | 47° | 59° | — | — |
| 1978 | 53° | 46° | 50° | — | — |
| 1977 | 79° | 52° | 65° | — | — |
| 1976warmest | 90° | 59° | 74° | 0.1" | — |
| 1975 | 57° | 43° | 50° | — | — |
| 1974 | 74° | 47° | 60° | — | — |
| 1973 | 72° | 46° | 59° | — | — |
| 1972 | 66° | 39° | 53° | — | — |
| 1971 | 77° | 55° | 66° | — | — |
53 years of data from PHILADELPHIA WSFO