Washington weather in December
One place stands in for Washington here — these are Seattle's numbers, not a statewide average.
Based on 1 weather station, in Seattle. One station — Seattle speaks for Puget Sound, not for the Cascades, the rainforest coast, or the dry half of the state east of the mountains.
Seattle & Puget Sound
Highs near 47°, nights around 37°, and 5.7 in of rain in a typical December.
| Place | Highs / lows | Wet days | Snow | The short version |
|---|---|---|---|---|
| Seattle | 47° / 37° | 12 | 1.7 in | Short daylight, long dinners, string lights doing heavy lifting. |
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.