Seattle weather by month › December
Seattle in December: weather and what to expect
It’s fine, but not the best. June and August are more pleasant.
December weather in Seattle
Daytime high46°F 8°C
Night low36°F 2°C
Rain5.9 in 149 mm
AirDry
SunWeak sun
In December, Seattle averages highs of 46°F (8°C) and lows of 36°F (2°C), with 5.9 in (149 mm) of rain. The air feels dry and the sun is weak. 1991–2020 averages, not a forecast.
Pack: a warm jacket, a rain jacket or umbrella.
Places with the same weather in December
Match out of 100 for December, one city per country.
Jan · Feb · Mar · Apr · May · Jun · Jul · Aug · Sep · Oct · Nov · Dec