Climate normals · 1970–2000
San Francisco Climate
San Francisco is a city in United States (CA) with a population of about 827,526. Its average annual temperature is 14°C (57°F), with roughly 850 mm of rain per year.
14°C
Avg Temp
850
Precip (mm/yr)
Sep
Hottest Month
Jan
Coldest Month
San Francisco Climate
San Francisco has an average annual temperature of 14°C (57°F) and receives about 850 mm of precipitation per year. The warmest month is September and the coldest is January. Figures are 1970–2000 climate normals.
14°C
Avg Temp
850
Precip (mm/yr)
Sep
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | 10° / 50° | 176 mm |
| February | 12° / 53° | 149 mm |
| March | 12° / 54° | 129 mm |
| April | 13° / 56° | 51 mm |
| May | 15° / 58° | 18 mm |
| June | 16° / 60° | 6 mm |
| July | 17° / 62° | 3 mm |
| August | 17° / 62° | 3 mm |
| September | 17° / 63° | 10 mm |
| October | 16° / 61° | 48 mm |
| November | 13° / 56° | 118 mm |
| December | 11° / 51° | 139 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit San Francisco
The most comfortable months to visit San Francisco are typically September, August and July, when temperatures are mildest and rainfall is relatively low. The hottest month is September (around 23°C high). The coldest is January (near 6°C low). January is usually the wettest month.
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Frequently Asked Questions
The most comfortable months to visit San Francisco are typically September, August and July, when temperatures are mildest and rainfall is relatively low (1970–2000 climate normals).
San Francisco, United States has an average annual temperature of 14°C and about 850 mm of precipitation per year. The warmest month is September and the coldest is January.
In September, the hottest month, daily highs in San Francisco average about 23°C (73°F).
Monthly climate normals (1970–2000) sampled from WorldClim 2.1 at ~9 km resolution. Humidity derived from vapor pressure. City coordinates and population from GeoNames.