San Francisco in September
In September, San Francisco averages 24°C (75°F) during the day and 14°C (57°F) at night, with only about 2 rainy days.
Conditions are comfortable for sightseeing without being sweltering. Skies are generally dry and clear.
It's peak hurricane season in San Francisco during September. Travel is possible but expect storm risk, possible flight disruption, and generally lower travel insurance coverage.
24°C
Avg high
14°C
Avg low
2
Rain days
5 mm
Rainfall
San Francisco in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 14°C / 57°F | 8°C / 46°F | 110 mm | 11 | — |
| February | 15°C / 59°F | 9°C / 48°F | 110 mm | 10 | — |
| March | 17°C / 63°F | 10°C / 50°F | 75 mm | 10 | — |
| April | 18°C / 64°F | 11°C / 52°F | 30 mm | 6 | — |
| May | 19°C / 66°F | 12°C / 54°F | 10 mm | 3 | — |
| June | 21°C / 70°F | 13°C / 55°F | 5 mm | 1 | — |
| July | 22°C / 72°F | 14°C / 57°F | 0 mm | 0 | — |
| August | 23°C / 73°F | 14°C / 57°F | 1 mm | 1 | — |
| September | 24°C / 75°F | 14°C / 57°F | 5 mm | 2 | — |
| October | 22°C / 72°F | 13°C / 55°F | 20 mm | 4 | — |
| November | 18°C / 64°F | 11°C / 52°F | 55 mm | 7 | — |
| December | 14°C / 57°F | 8°C / 46°F | 85 mm | 9 | — |
Other cities with similar September weather
Check the live 10-day forecast and sunrise/sunset.