San Francisco, California weather in March

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

Average high: 57°F
Average low: 47°F
Rainy days: ~11 per month
Total precipitation: 4.1 in
Warmest recorded: 82°F
Coldest recorded: 40°F

Expect March days in San Francisco, California to top out around 57°F and cool to about 47°F overnight, with roughly 11 days of measurable rain across the month. In recent years March has ranged from 40°F to 82°F.

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