San Francisco weather in March
March in San Francisco: cool, rainy, with clean air — a great time to visit.
#9 of 12 months in San Francisco · #252 of 604 destinations to visit in March · comfort 78/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
San Francisco climate normals — March
| Daytime high | 16°C / 60°F | 🙂 cool |
|---|---|---|
| Nighttime low | 8°C / 46°F | |
| Feels like (high) | 14°C / 57°F | |
| Rainfall | 82 mm / 3.2 in | 🌧 rainy |
| Rainy days | 11 days | |
| Humidity | 78% | 💦 very humid |
| Dew point | 7°C / 44°F | |
| Sunshine | 9.4 h/day | |
| Daylight | 12 h | |
| Wind | 18 km/h / 11 mph | |
| Air quality (US AQI) | 44 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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San Francisco in March — FAQ
- Is March a good time to visit San Francisco?
- March in San Francisco: cool, rainy, with clean air — a great time to visit. It ranks #9 of 12 months for San Francisco on SeasonMap's comfort score (78/100).
- What is the weather like in San Francisco in March?
- In March, San Francisco averages a daily high of 15.5°C and a low of 7.6°C, with about 81.6 mm of rain over roughly 11 rainy days.
- What is the air quality in San Francisco in March?
- San Francisco has a mean US Air Quality Index of about 44 in March.