San Francisco weather by month › September
San Francisco in September: weather and what to expect
Yes. September is one of the best months to visit San Francisco.
September weather in San Francisco
Daytime high74°F 23°C
Night low54°F 12°C
Rain0.2 in 4 mm
AirComfortable
SunSunny
In September, San Francisco averages highs of 74°F (23°C) and lows of 54°F (12°C), with 0.2 in (4 mm) of rain. The air feels comfortable and the sun is sunny. 1991–2020 averages, not a forecast.
Pack: light layers.
Places with the same weather in September
Match out of 100 for September, one city per country.
Jan · Feb · Mar · Apr · May · Jun · Jul · Aug · Sep · Oct · Nov · Dec