Is Seattle hot in December?
Days are typically cold at 8.5°C, while nights average 2.6°C.
United States · 1991–2020 normal
Seattle in
December.
Typical December weather in Seattle: 8.5°C by day, 2.6°C at night, 136 mm of rain over 14.9 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high8.5°C
Typical low2.6°C
Rain136 mm
Wet days14.9
In the year-round weather comparison, December scores 5 out of 100 (July leads the year at 96). Daylight is calculated as 8 h 27 from latitude 47.61°.
December at a glance
What is Seattle like in December?
Plain answers from the measured climate record—not a forecast or a promise about a particular trip.
Does it rain much?
The measured monthly average is 136 mm across about 15 wet days.
How much daylight is there?
There are about 8 h 27 between sunrise and sunset at mid-month, calculated from the place latitude.
Is December a good time to visit?
December ranks 12 of 12 in our weather comparison; July ranks first.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 5809844
- NOAA station
- USW00024234 · SEATTLE BOEING FLD
- Station distance
- 6.9 km from the place centre
- Coverage
- Good coverage · 23 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.
Next step
Choose your month.
Then plan the details.
The weather comparison for Seattle is based on climate evidence, not payments from travel companies. Flight, accommodation and activity links will be clearly labelled when they are added; there are no booking offers on this page today.
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