Weather on May 20
Philadelphia, PA
55 Years of Data
Avg High
75°F
Avg Low
57°F
Warmest
1996
83°F avg
Coldest
1987
51°F avg
About This Date
May 20th in Philadelphia, PA typically brings pleasant spring weather, with average highs around 75°F and lows near 57°F. Over 54 years of records, the warmest May 20th was in 1996 (83°F average), while the coldest was 1987 (51°F) — a 32°F range across recorded history. Rain or other precipitation has occurred on about 30% of May 20th dates historically, with the wettest May 20th recording 2.11" of rain. The last decade has been 4.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.7°F warmer on this date compared to 20-30 years ago.
Planning for May 20th in Philadelphia, PA? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 72° | 49° | 60° | — | — |
| 2024 | 87° | 63° | 75° | — | — |
| 2023 | 75° | 57° | 66° | — | — |
| 2022 | 79° | 60° | 69° | — | — |
| 2021 | 90° | 61° | 75° | — | — |
| 2019 | 89° | 72° | 80° | — | — |
| 2018 | 72° | 53° | 62° | 0.18" | — |
| 2017 | 94° | 61° | 77° | 0.3" | — |
| 2016 | 75° | 55° | 65° | — | — |
| 2015 | 85° | 59° | 72° | — | — |
| 2014 | 74° | 56° | 65° | — | — |
| 2013 | 67° | 60° | 63° | 0.1" | — |
| 2012 | 81° | 60° | 70° | — | — |
| 2011 | 68° | 57° | 63° | 0.38" | — |
| 2010 | 69° | 57° | 63° | — | — |
| 2009 | 81° | 58° | 69° | — | — |
| 2008 | 59° | 49° | 54° | 1.42" | — |
| 2007 | 74° | 54° | 64° | 0.33" | — |
| 2006 | 76° | 52° | 64° | — | — |
| 2005 | 60° | 50° | 55° | 1.91" | — |
| 2004 | 78° | 61° | 69° | 0.03" | — |
| 2003 | 82° | 56° | 69° | 0.18" | — |
| 2002 | 62° | 44° | 53° | — | — |
| 2001 | 67° | 53° | 60° | 1.32" | — |
| 2000 | 55° | 49° | 52° | 0.56" | — |
| 1999 | 77° | 54° | 65° | — | — |
| 1998 | 94° | 65° | 79° | — | — |
| 1997 | 75° | 59° | 67° | — | — |
| 1996warmest | 97° | 69° | 83° | 2.11" | — |
| 1995 | 63° | 56° | 59° | 0.13" | — |
| 1994 | 57° | 47° | 52° | 0.71" | — |
| 1993 | 62° | 53° | 58° | — | — |
| 1992 | 78° | 50° | 64° | — | — |
| 1991 | 76° | 50° | 63° | — | — |
| 1990 | 73° | 54° | 63° | — | — |
| 1989 | 84° | 60° | 72° | — | — |
| 1988 | 67° | 59° | 63° | — | — |
| 1987coldest | 53° | 48° | 51° | — | — |
| 1986 | 72° | 66° | 69° | — | — |
| 1985 | 83° | 57° | 70° | — | — |
| 1984 | 85° | 67° | 76° | — | — |
| 1983 | 76° | 58° | 67° | — | — |
| 1982 | 82° | 62° | 72° | — | — |
| 1981 | 75° | 51° | 63° | — | — |
| 1980 | 72° | 61° | 66° | — | — |
| 1979 | 70° | 55° | 62° | — | — |
| 1978 | 88° | 62° | 75° | — | — |
| 1977 | 84° | 56° | 70° | — | — |
| 1976 | 78° | 52° | 65° | 0.05" | — |
| 1975 | 87° | 66° | 77° | — | — |
| 1974 | 73° | 54° | 63° | — | — |
| 1973 | 60° | 56° | 58° | — | — |
| 1972 | 63° | 55° | 59° | 0.61" | — |
| 1971 | 77° | 52° | 64° | — | — |
54 years of data from PHILADELPHIA WSFO