‹ Pennsylvania weather by month
Pennsylvania weather in May
One place stands in for Pennsylvania here — these are Philadelphia's numbers, not a statewide average.
Based on 1 weather station, in Philadelphia. One station — Philadelphia holds down the state’s mild southeast corner; the mountains and the Erie snowbelt are a different, colder Pennsylvania.
Philadelphia
Highs near 74°, nights around 54°, and 3.3 in of rain in a typical May.
| Place | Highs / lows | Wet days | The short version |
|---|---|---|---|
| Philadelphia | 74° / 54° | 6 | Everything blooms and nothing is uncomfortable yet. |
Each place above has its own page for the full story — what the month feels like, what to pack, and whether the timing is right.