Weather on May 18
Philadelphia, PA
55 Years of Data
Avg High
73°F
Avg Low
56°F
Warmest
1986
80°F avg
Coldest
1973
52°F avg
About This Date
May 18th in Philadelphia, PA typically brings pleasant spring weather, with average highs around 73°F and lows near 56°F. Over 54 years of records, the warmest May 18th was in 1986 (80°F average), while the coldest was 1973 (52°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 39% of May 18th dates historically, with the wettest May 18th recording 1.91" of rain. The last decade has been 2.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.6°F warmer on this date compared to 20-30 years ago.
Planning for May 18th in Philadelphia, PA? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 87° | 64° | 76° | — | — |
| 2024 | 69° | 59° | 64° | — | — |
| 2023 | 68° | 46° | 57° | — | — |
| 2022 | 81° | 56° | 68° | — | — |
| 2021 | 79° | 55° | 67° | — | — |
| 2019 | 82° | 62° | 72° | 0.1" | — |
| 2018 | 68° | 61° | 64° | 0.23" | — |
| 2017 | 93° | 63° | 78° | — | — |
| 2016 | 63° | 56° | 59° | 0.33" | — |
| 2015 | 84° | 72° | 78° | 0.13" | — |
| 2014 | 69° | 52° | 60° | — | — |
| 2013 | 78° | 62° | 70° | — | — |
| 2012 | 74° | 57° | 65° | — | — |
| 2011 | 69° | 59° | 64° | 1.02" | — |
| 2010 | 71° | 50° | 61° | 1.17" | — |
| 2009 | 61° | 45° | 53° | — | — |
| 2008 | 70° | 51° | 60° | 0.97" | — |
| 2007 | 63° | 51° | 57° | — | — |
| 2006 | 78° | 56° | 67° | 0.46" | — |
| 2005 | 77° | 53° | 65° | — | — |
| 2004 | 84° | 65° | 74° | 0.23" | — |
| 2003 | 61° | 48° | 54° | — | — |
| 2002 | 56° | 48° | 52° | 0.08" | — |
| 2001 | 61° | 56° | 58° | 0.13" | — |
| 2000 | 84° | 62° | 73° | 0.1" | — |
| 1999 | 74° | 57° | 65° | 0.71" | — |
| 1998 | 89° | 62° | 76° | — | — |
| 1997 | 72° | 54° | 63° | 0.1" | — |
| 1996 | 73° | 59° | 66° | — | — |
| 1995 | 71° | 61° | 66° | 0.89" | — |
| 1994 | 63° | 50° | 56° | — | — |
| 1993 | 62° | 52° | 57° | — | — |
| 1992 | 74° | 56° | 65° | — | — |
| 1991 | 73° | 52° | 62° | — | — |
| 1990 | 71° | 60° | 66° | — | — |
| 1989 | 86° | 64° | 75° | — | — |
| 1988 | 62° | 57° | 60° | — | — |
| 1987 | 91° | 58° | 74° | — | — |
| 1986warmest | 91° | 70° | 80° | — | — |
| 1985 | 66° | 54° | 60° | — | — |
| 1984 | 65° | 54° | 59° | — | — |
| 1983 | 70° | 47° | 58° | — | — |
| 1982 | 79° | 61° | 70° | — | — |
| 1981 | 65° | 52° | 58° | — | — |
| 1980 | 68° | 58° | 63° | — | — |
| 1979 | 61° | 56° | 58° | — | — |
| 1978 | 69° | 51° | 60° | 0.18" | — |
| 1977 | 91° | 67° | 79° | 0.69" | — |
| 1976 | 75° | 42° | 59° | 1.91" | — |
| 1975 | 71° | 58° | 64° | 0.05" | — |
| 1974 | 78° | 62° | 70° | 0.13" | — |
| 1973coldest | 60° | 44° | 52° | — | — |
| 1972 | 74° | 54° | 64° | 0.25" | — |
| 1971 | 85° | 50° | 67° | — | — |
54 years of data from PHILADELPHIA CITY