Weather on March 21
Philadelphia, PA
55 Years of Data
Avg High
54°F
Avg Low
38°F
Warmest
2012
66°F avg
Coldest
1986
30°F avg
About This Date
March 21st in Philadelphia, PA typically brings cool spring weather, with average highs around 54°F and lows near 38°F. Over 53 years of records, the warmest March 21st was in 2012 (66°F average), while the coldest was 1986 (30°F) — a 36°F range across recorded history. Precipitation has occurred on 32% of recorded March 21st dates, with snow falling 2% of the time. The last decade has been 4.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.0°F warmer on this date compared to 20-30 years ago.
Planning for March 21st in Philadelphia, PA? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 70° | 39° | 54° | 1.09" | — |
| 2024 | 61° | 30° | 45° | — | — |
| 2023 | 53° | 36° | 44° | — | — |
| 2022 | 78° | 53° | 66° | — | — |
| 2021 | 60° | 39° | 50° | — | — |
| 2019 | 56° | 42° | 49° | 0.3" | — |
| 2017 | 54° | 34° | 44° | — | — |
| 2016 | 42° | 34° | 38° | 0.25" | — |
| 2015 | 45° | 32° | 38° | 1.83" | 0.5" |
| 2014 | 55° | 38° | 46° | — | — |
| 2013 | 49° | 31° | 40° | 0.03" | — |
| 2012warmest | 75° | 57° | 66° | 0.03" | — |
| 2011 | 53° | 38° | 45° | 0.97" | — |
| 2010 | 75° | 52° | 63° | — | — |
| 2009 | 51° | 36° | 43° | — | — |
| 2008 | 51° | 35° | 43° | — | — |
| 2007 | 49° | 29° | 39° | — | — |
| 2006 | 48° | 32° | 40° | — | — |
| 2005 | 48° | 39° | 44° | — | — |
| 2004 | 52° | 34° | 43° | — | — |
| 2003 | 61° | 54° | 57° | 0.05" | — |
| 2002 | 58° | 34° | 46° | — | — |
| 2001 | 46° | 43° | 44° | 2.77" | — |
| 2000 | 43° | 40° | 41° | 6.58" | — |
| 1999 | 55° | 39° | 47° | 5.61" | — |
| 1998 | 40° | 34° | 37° | 0.51" | — |
| 1997 | 58° | 39° | 48° | — | — |
| 1996 | 45° | 36° | 40° | 0.08" | — |
| 1995 | 63° | 39° | 51° | 0.99" | — |
| 1994 | 52° | 38° | 45° | — | — |
| 1993 | 52° | 33° | 42° | — | — |
| 1992 | 40° | 31° | 35° | — | — |
| 1991 | 58° | 42° | 50° | — | — |
| 1990 | 54° | 34° | 44° | — | — |
| 1989 | 49° | 36° | 42° | — | — |
| 1988 | 39° | 24° | 32° | — | — |
| 1987 | 48° | 36° | 42° | — | — |
| 1986coldest | 41° | 20° | 30° | — | — |
| 1985 | 50° | 33° | 42° | — | — |
| 1984 | 64° | 42° | 53° | — | — |
| 1983 | 63° | 41° | 52° | — | — |
| 1982 | 49° | 40° | 44° | — | — |
| 1981 | 44° | 31° | 37° | — | — |
| 1980 | 62° | 40° | 51° | — | — |
| 1979 | 67° | 44° | 55° | — | — |
| 1978 | 71° | 39° | 55° | 0.28" | — |
| 1977 | 57° | 39° | 48° | — | — |
| 1976 | 72° | 48° | 60° | 0.25" | — |
| 1975 | 55° | 38° | 46° | — | — |
| 1974 | 54° | 38° | 46° | 3.84" | — |
| 1973 | 44° | 32° | 38° | — | — |
| 1972 | 52° | 37° | 44° | — | — |
| 1971 | 48° | 36° | 42° | — | — |
53 years of data from PHILADELPHIA WSFO