Weather in Seattle: December
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Average day temperature: | 43.9°F |
| Average night temperature: | 38.9°F | |
 |
Number of sunny days: | 5 days |
| Day length: | 8.4 - 8.7 hours | |
 |
Number of rainy days: | 5 days |
| Precipitation totals: | 2.5 in. | |
| more information | ||
14 days
forecast
forecast
| Seattle |
weather in
January
January
| Seattle |
Air temperature in December, °F
Show year:
2025
2024
2023
The highest day temperature during December of 2025 was 57°F. At the same time the lowest night temperature was 33°F. Daily and nightly averages during December were 47.9°F and 42.4°F.
Sunny, partly cloudy and cloudy days
Mostly all days in December are cloudy but sunny and partly cloudy days are also possible.
Precipitation total in December, in.
Precipitation total value in Seattle in December is 2.1 in. Other months of the year show relatively similar values.
Wind speed in December, mph
The average wind speed value in December is 5.0 mph
Average sunny hours
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in December is: 2.5.
Best time for vacation in Seattle
Seattle on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Seattle
Local time: 05:11
January 12, monday
0600
46°F
N
9 mph
9 mph
0900
46°F
N
10 mph
10 mph
1200
50°F
N
10 mph
10 mph
1500
50°F
N
7 mph
7 mph
1800
50°F
NW
7 mph
7 mph
2100
50°F
N
9 mph
9 mph
January 13, tuesday
0000
50°F
N
6 mph
6 mph
0300
50°F
N
5 mph
5 mph
