Rainy days · California
How often does it rain in San Francisco?
A weather alert is in force here or thunderstorms are in the forecast, so no joke today. The National Weather Service has the details.
San Francisco gets measurable rain or snow on about 65 days a year, adding up to about 20 inches.
November usually brings San Francisco about 7 wet days and 2.0 inches. The wettest month is usually December, with about 11 wet days, and the driest is July, with less than 1 wet day. That makes San Francisco number 117 of the 129 US cities we track, rainiest first.
Last updated
A weather alert is in force here or thunderstorms are in the forecast, so no joke today. The National Weather Service has the details.
Live 48-hour check from OpenWeatherMap, refreshed about every half hour. Alerts from the National Weather Service.
Rainy days, month by month
| Month | Wet days | Inches |
|---|---|---|
| January | 11 | 3.9 |
| February | 11 | 4.0 |
| March | 10 | 2.7 |
| April | 6 | 1.4 |
| May | 3 | 0.5 |
| June | 1 | 0.1 |
| July | 0 | trace |
| August | 0 | trace |
| September | 1 | 0.1 |
| October | 3 | 0.8 |
| November | 7 | 2.0 |
| December | 11 | 4.1 |
Cities with about as many rainy days
- Lubbock, Texas: about 63 wet days a year
- Amarillo, Texas: about 69 wet days a year
- San Jose, California: about 61 wet days a year
Source: NOAA daily precipitation records for the San Francisco area, 1991 to 2020 (at least 30 complete years behind every month), via the Applied Climate Information System. A wet day here means at least a hundredth of an inch of rain or melted snow.