Climate almanac
San Francisco
Morazan, El Salvador · 13.69°, -88.10°
What is the weather like in San Francisco in September?
In September, San Francisco is typically 88°F (31°C) during the day and 71°F (22°C) at night. The month brings about 12 in (315 mm) of precipitation in total.
- Average high88°F (31°C)
- Average low71°F (22°C)
- Precipitation12 in (315 mm)
- Clear or mostly clear days1
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)