Click on a day for an hourly weather forecast
The temperatures in San Francisco in May are usually low and can range between 10°C and 20°C.
The wather in San Francisco in May can vary between cold and nice weather days. Expect a few rainy days but usually not more than 3.
Our weather forecast can give you a great sense of what weather to expect in San Francisco in May 2025.
If you’re planning to visit San Francisco in the near future, we highly recommend that you review the 14 day weather forecast for San Francisco before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 15° / 7° | 4 | 27 | 0 | 63 mm | Good | San Francisco in January |
| February | 16° / 7° | 4 | 24 | 0 | 61 mm | Good | San Francisco in February |
| March | 17° / 8° | 5 | 26 | 0 | 62 mm | Good | San Francisco in March |
| April | 18° / 9° | 2 | 28 | 0 | 22 mm | Good | San Francisco in April |
| May | 20° / 10° | 1 | 30 | 0 | 13 mm | Good | San Francisco in May |
| June | 23° / 12° | 0 | 30 | 0 | 6 mm | Perfect | San Francisco in June |
| July | 25° / 14° | 0 | 31 | 0 | 3 mm | Perfect | San Francisco in July |
| August | 25° / 14° | 0 | 31 | 0 | 3 mm | Perfect | San Francisco in August |
| September | 25° / 14° | 0 | 30 | 0 | 4 mm | Perfect | San Francisco in September |
| October | 23° / 13° | 1 | 30 | 0 | 26 mm | Perfect | San Francisco in October |
| November | 18° / 10° | 3 | 27 | 0 | 37 mm | Good | San Francisco in November |
| December | 14° / 8° | 4 | 27 | 0 | 55 mm | Good | San Francisco in December |