San Francisco weather by month › May
San Francisco in May: weather and what to expect
It’s fine, but not the best. September to October are more pleasant.
May weather in San Francisco
Daytime high68°F 20°C
Night low50°F 10°C
Rain1.0 in 25 mm
AirComfortable
SunStrong sun
In May, San Francisco averages highs of 68°F (20°C) and lows of 50°F (10°C), with 1.0 in (25 mm) of rain. The air feels comfortable and the sun is strong. 1991–2020 averages, not a forecast.
Pack: light layers, a sweater for evenings.
Places with the same weather in May
Match out of 100 for May, one city per country.
Jan · Feb · Mar · Apr · May · Jun · Jul · Aug · Sep · Oct · Nov · Dec