San Francisco weather by month › January
San Francisco in January: weather and what to expect
Wet. January falls in San Francisco’s rainy season, with about 6.3 in (160 mm) of rain. For drier weather, go in September to October.
January weather in San Francisco
Daytime high58°F 14°C
Night low44°F 7°C
Rain6.3 in 160 mm
AirDry
SunWeak sun
In January, San Francisco averages highs of 58°F (14°C) and lows of 44°F (7°C), with 6.3 in (160 mm) of rain. The air feels dry and the sun is weak. 1991–2020 averages, not a forecast.
Pack: a sweater for evenings, a rain jacket or umbrella.
Places with the same weather in January
Match out of 100 for January, one city per country.
Jan · Feb · Mar · Apr · May · Jun · Jul · Aug · Sep · Oct · Nov · Dec