Weather in Seattle in December
In an average December, Seattle sees a daily high around 45°F and a low around 38°F, based on 1980–2026 of local climate records.
| Average high | 45°F |
|---|---|
| Typical high range | 39°F to 52°F |
| Average low | 38°F |
| Typical low range | 31°F to 45°F |
| Average daily precipitation | 0.20 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
61°F
1980-12-27
Lowest
21°F
1990-12-21
Low
Highest
56°F
1980-12-26
Lowest
6°F
1990-12-21
Feels-like
Highest
56°F
1980-12-26
Lowest
-6°F
1990-12-21
Humidity
Highest
10.8 g/m³
1980-12-26
Lowest
1.0 g/m³
1983-12-24
Wind
Highest
31 mph
1995-12-13
Lowest
3 mph
1986-12-07
Gust
Highest
63 mph
2006-12-15
Lowest
7 mph
1997-12-25
Precip
Wettest
11.87 in
2025
Driest
1.65 in
1985
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