‹ Pennsylvania weather by month
Pennsylvania weather in December
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 46°, nights around 31°, and 3.5 in of snow in a typical December.
| Place | Highs / lows | Wet days | Snow | The short version |
|---|---|---|---|---|
| Philadelphia | 46° / 31° | 2 | 3.5 in | Bundle up. The city is at its most handsome now. |
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.