San Francisco is a popular location any time of the year. Summer is the prime tourist season, but its summer weather is none too hospitable: the bay is often foggy, while inland or north in the Wine Country it's often too hot and dusty for comfort. Local weather patterns are highly unpredictable, but generally the best months weather-wise are between mid-September and mid-November.
| Month | Temp (°C) | Rainfall (mm) | Humidity (%) | Sunshine (hours) |
| Jan | 7 - 13 | 119 | 5 | |
| Feb | 8 - 15 | 97 | 7 | |
| Mar | 9 - 16 | 79 | 8 | |
| Apr | 9 - 17 | 38 | 10 | |
| May | 11 - 17 | 18 | 11 | |
| Jun | 11 - 19 | 3 | 11 | |
| Jul | 12 - 18 | 0 | 10 | |
| Aug | 12 - 18 | 0 | 9 | |
| Sep | 13 - 21 | 8 | 9 | |
| Oct | 12 - 20 | 25 | 8 | |
| Nov | 11 - 17 | 64 | 7 | |
| Dec | 8 - 14 | 112 | 6 |