Weather on May 18
Philadelphia, PA
55 Years of Data
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.
| 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° | — | — |
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.