San Francisco, California weather in October

Averages from 2021–2025 (155 days of record).

Average high: 68°F
Average low: 55°F
Rainy days: ~3 per month
Total precipitation: 1.7 in
Warmest recorded: 100°F
Coldest recorded: 46°F

Expect October days in San Francisco, California to top out around 68°F and cool to about 55°F overnight, with roughly 3 days of measurable rain across the month. In recent years October has ranged from 46°F to 100°F.

Other months

January February March April May June July August September November December

Current San Francisco, California forecast → · Historical data by Open-Meteo (ERA5).