San Francisco: Weather Guide & Climate
Complete month-by-month weather guide: San Francisco. Best time to visit: September, October. Plan your trip with detailed climate data.
☀️ Climate Overview
San Francisco has a Moderate climate with average yearly highs of 20°C, lows of 11°C, and approximately 4 rainy days per month.
The best time to visit San Francisco is during September, October, when conditions are perfect for sightseeing and exploration
Drier season: May–Oct Wetter season: Jan–Dec
Now
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Air Quality
Hottest
Coldest
Driest Month
Windiest Month
19 km/h
May (gusts 43)
Sea Temp Range
12° – 17°C
Warmest water: September (17°C)
Forecast for your trip dates
Up to 14 days aheadWeather by Season
Spring
Mar–May
Summer
Jun–Aug
Autumn
Sep–Nov
Winter
Dec–Feb
Month-by-Month Weather Table
January
February
March
April
May
June
July
August
September
BestOctober
BestNovember
December
| Month | High | Low | Rain | Sunshine | Humidity | UV Index | Crowds | Condition | View Details |
|---|---|---|---|---|---|---|---|---|---|
| January | 15°C | 7°C | 7d (71mm) | 7.2h | 78% Humid | 3.5 Moderate | | Good | View Details → |
| February | 17°C | 7°C | 6d (59mm) | 8.5h | 72% Humid | 5.2 High | | Good | View Details → |
| March | 17°C | 8°C | 10d (76mm) | 9.7h | 72% Humid | 6.7 High | | Good | View Details → |
| April | 19°C | 9°C | 3d (17mm) | 11.4h | 70% Humid | 9.3 Very High | | Good | View Details → |
| May | 22°C | 11°C | 2d (11mm) | 12.8h | 68% Humid | 10.8 Extreme | | Good | View Details → |
| June | 23°C | 13°C | 0d (0mm) | 13.4h | 69% Humid | 11.4 Extreme | | Good | View Details → |
| July | 23°C | 14°C | 0d (0mm) | 13.1h | 73% Humid | 11 Extreme | | Good | View Details → |
| August | 25°C | 15°C | 0d (1mm) | 12.4h | 73% Humid | 9.9 Very High | | Good | View Details → |
| September (best) | 25°C | 15°C | 0d (3mm) | 11.2h | 73% Humid | 8.1 Very High | | Excellent | View Details → |
| October (best) | 24°C | 12°C | 2d (23mm) | 9.5h | 69% Humid | 6 High | | Excellent | View Details → |
| November | 18°C | 9°C | 6d (44mm) | 8.1h | 73% Humid | 4.1 Moderate | | Good | View Details → |
| December | 14°C | 7°C | 11d (109mm) | 6.5h | 82% Very Humid | 3 Moderate | | Good | View Details → |
San Francisco
San Francisco: walk the Golden Gate Bridge, tour Alcatraz, ride cable cars up steep streets, and explore a major tech innovation hub.
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Frequently Asked Questions
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More San Francisco Guides
Best Time to Visit
Coming soon
Things to Do
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Where to Stay
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Cost & Budget
Daily costs, money-saving tips, and budget breakdown
Itineraries
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Complete travel guide for San Francisco: top things to do, itineraries, and typical costs.