San Francisco Climate: Weather by Month and Best Time to Visit
Best months for San Francisco: September, August, May, April.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 30°C | 19°C | 120 mm | 9 | – | – | 7.3 |
| February | 29°C | 18°C | 116 mm | 9 | – | – | 7.7 |
| March | 27°C | 17°C | 138 mm | 9 | – | – | 7.6 |
| April | 24°C | 14°C | 100 mm | 8 | – | – | 7.9 |
| May | 21°C | 11°C | 47 mm | 6 | – | – | 8.1 |
| June | 18°C | 8°C | 30 mm | 4 | – | – | 7.8 |
| July | 17°C | 6°C | 20 mm | 3 | – | – | 7.9 |
| August | 20°C | 8°C | 39 mm | 4 | – | – | 8.3 |
| September | 23°C | 11°C | 51 mm | 5 | – | – | 8.4 |
| October | 25°C | 14°C | 115 mm | 9 | – | – | 7.7 |
| November | 28°C | 16°C | 119 mm | 9 | – | – | 7.7 |
| December | 30°C | 18°C | 128 mm | 10 | – | – | 7.4 |