United States of America
San Francisco sees feels-like daytime highs peak around 24°C in September and nighttime lows bottom out near 8.8°C in January. January is the wettest month (~95 mm), while July is the driest (~1 mm). For sunshine, August leads with about 90% clear skies.
Based on mild feels-like temperatures and low rain chances, the most comfortable months are September, August, and July — expect around 16.2–24°C with roughly 2% chance of rain on a given day in September.
| Month | Low / High °C | Rain % | Rainfall | Clear skies | Wind |
|---|---|---|---|---|---|
| January | 8.8° / 14.6° | 28% | 95 mm | 47% | 13.6 kph |
| February | 10.1° / 16.5° | 27% | 95 mm | 47% | 13.8 kph |
| March | 12.1° / 18.1° | 24% | 73 mm | 51% | 14.5 kph |
| April | 12.8° / 20.3° | 14% | 32 mm | 58% | 14.9 kph |
| May | 13.6° / 20.6° | 7% | 13 mm | 67% | 15.3 kph |
| June | 14.9° / 22.5° | 3% | 4 mm | 80% | 15.1 kph |
| July☀ | 15.9° / 23° | 1% | 1 mm | 89% | 14 kph |
| August☀ | 16° / 23° | 0% | 1 mm | 90% | 13.1 kph |
| September☀ | 16.2° / 24° | 2% | 5 mm | 86% | 12.2 kph |
| October | 15.5° / 22.2° | 9% | 25 mm | 72% | 11.9 kph |
| November | 12.1° / 17.7° | 20% | 60 mm | 56% | 12.8 kph |
| December | 8.9° / 14.6° | 28% | 93 mm | 49% | 13.7 kph |
Feels-like temperatures from long-term historical data; ☀ marks the most comfortable months (mild temperatures, low rain).
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