Weather in Seattle in December
In an average December, Seattle sees a daily high around 44°F and a low around 35°F, based on 1980–2026 of local climate records.
| Average high | 44°F |
|---|---|
| Typical high range | 38°F to 51°F |
| Average low | 35°F |
| Typical low range | 26°F to 43°F |
| Average daily precipitation | 0.30 in |
December records
The most extreme December on record for each metric, across 1980–2026. For rainfall, the wettest and driest are by total December accumulation.
High
Highest
62°F
1980-12-27
Lowest
18°F
1990-12-29
Low
Highest
55°F
1980-12-26
Lowest
-2°F
1990-12-21
Feels-like
Highest
55°F
1980-12-26
Lowest
-13°F
1990-12-21
Humidity
Highest
10.5 g/m³
1980-12-26
Lowest
0.6 g/m³
1983-12-24
Wind
Highest
25 mph
1995-12-13
Lowest
3 mph
1999-12-30
Gust
Highest
67 mph
1987-12-10
Lowest
6 mph
2011-12-06
Precip
Wettest
16.55 in
2025
Driest
1.71 in
1985
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