San Francisco weather in October
October in San Francisco: nice, dry, with clean air — an excellent time to visit.
#5 of 12 months in San Francisco · #46 of 604 destinations to visit in October · comfort 91/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
San Francisco climate normals — October
| Daytime high | 22°C / 72°F | 😎 nice |
|---|---|---|
| Nighttime low | 12°C / 54°F | |
| Feels like (high) | 21°C / 70°F | |
| Rainfall | 22 mm / 0.9 in | ☀️ dry |
| Rainy days | 1 days | |
| Humidity | 75% | 💧 humid |
| Dew point | 11°C / 51°F | |
| Sunshine | 9.6 h/day | |
| Daylight | 11.2 h | |
| Wind | 15 km/h / 9 mph | |
| Air quality (US AQI) | 40 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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San Francisco in October — FAQ
- Is October a good time to visit San Francisco?
- October in San Francisco: nice, dry, with clean air — an excellent time to visit. It ranks #5 of 12 months for San Francisco on SeasonMap's comfort score (91/100).
- What is the weather like in San Francisco in October?
- In October, San Francisco averages a daily high of 22.3°C and a low of 12.4°C, with about 22 mm of rain over roughly 1.4 rainy days.
- What is the air quality in San Francisco in October?
- San Francisco has a mean US Air Quality Index of about 40 in October.