San Francisco, CA Weather & Climate Normals
What a normal year in San Francisco actually looks like
On the 30-year record NOAA keeps for San Francisco, CA, the comfort score comes out to 72/100, mild with real seasons: A solid stretch of comfortable months alongside a noticeable but not extreme summer or winter. Only 7 months a year land in the 55–75°F range this site treats as mild.
How much San Francisco's weather actually swings
Average temperatures in San Francisco run from 52°F in Jan up to 60°F in Sep, a 7.8°F seasonal swing, one of the smaller gaps in this dataset.
San Francisco, month by month
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 59°F | 46°F | 3.94in | 0in |
| Feb | 60°F | 47°F | 4.01in | 0in |
| Mar | 61°F | 48°F | 2.98in | 0in |
| Apr | 60°F | 49°F | 1.37in | 0in |
| May | 60°F | 51°F | 0.64in | 0in |
| Jun | 61°F | 53°F | 0.19in | 0in |
| Jul | 62°F | 54°F | 0.01in | 0in |
| Aug | 64°F | 55°F | 0.05in | 0in |
| Sep | 65°F | 55°F | 0.11in | 0in |
| Oct | 66°F | 53°F | 0.9in | 0in |
| Nov | 64°F | 50°F | 2.22in | 0in |
| Dec | 59°F | 46°F | 4.22in | 0in |
If you're timing a visit, most of the year (7 of 12 months) are San Francisco's mildest stretch; if you're moving there, you should plan around Jan's cold instead.
How wet San Francisco actually gets
Over a typical year, San Francisco sees about 20.64in of precipitation a year across roughly 66 days with measurable rain or snow, with 0in of snow a year.
San Francisco against the rest of the country
Out of 4876 cities scored here, San Francisco comes in at 232; within CA alone it ranks 230 of 429. Population is about 827,526.
Checking the actual forecast
These figures come from San Francisco Oceanside, CA US, the NOAA station 28.8 miles from San Francisco, averaged over 30 years, not tomorrow's forecast.
More on how this is worked out
Why some cities show no snow or rain figure · What a 30-year climate normal actually is