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 17°C, lows of 11°C, and approximately 3 rainy days per month.
The best time to visit San Francisco is during September, October, when conditions are perfect for sightseeing and exploration
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Air Quality
Best Time
Sep, Oct
Hottest
Coldest
Driest Month
Forecast for your trip dates
Up to 16 days ahead| Month | High | Low | Rainy days | Condition |
|---|---|---|---|---|
| January | 13°C | 8°C | 8 | Good |
| February | 15°C | 8°C | 0 | Good |
| March | 14°C | 9°C | 9 | Good |
| April | 15°C | 10°C | 3 | Good |
| May | 18°C | 12°C | 7 | Good |
| June | 19°C | 13°C | 0 | Good |
| July | 18°C | 13°C | 0 | Good |
| August | 20°C | 15°C | 0 | Good |
| September | 21°C | 15°C | 0 | Excellent (best) |
| October | 22°C | 14°C | 0 | Excellent (best) |
| November | 16°C | 9°C | 3 | Good |
| December | 14°C | 8°C | 6 | Good |
Weather data: Open-Meteo Archive (2020-2025) • Open-Meteo.com (CC BY 4.0) • Historical avg. 2020–2025
Weather by Season
Winter
Dec–Feb
High: 14°C
Low: 8°C
Rainy days: 5 days/month
Spring
Mar–May
High: 16°C
Low: 10°C
Rainy days: 6 days/month
Summer
Jun–Aug
High: 19°C
Low: 14°C
Rainy days: 0 days/month
Autumn
Sep–Nov
High: 20°C
Low: 13°C
Rainy days: 1 days/month
Month-by-Month Weather Table
January
February
March
April
May
June
July
August
September
BestOctober
BestNovember
December
| Month | High | Low | Rainy days | Condition | View Details |
|---|---|---|---|---|---|
| January | 13°C | 8°C | 8 | Good | View Details → |
| February | 15°C | 8°C | 0 | Good | View Details → |
| March | 14°C | 9°C | 9 | Good | View Details → |
| April | 15°C | 10°C | 3 | Good | View Details → |
| May | 18°C | 12°C | 7 | Good | View Details → |
| June | 19°C | 13°C | 0 | Good | View Details → |
| July | 18°C | 13°C | 0 | Good | View Details → |
| August | 20°C | 15°C | 0 | Good | View Details → |
| September (best) | 21°C | 15°C | 0 | Excellent | View Details → |
| October (best) | 22°C | 14°C | 0 | Excellent | View Details → |
| November | 16°C | 9°C | 3 | Good | View Details → |
| December | 14°C | 8°C | 6 | 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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Common Questions
What type of climate does San Francisco have?
San Francisco has a Moderate climate with average yearly temperatures of 17°C (highs) and 11°C (lows).
When is the best time to visit San Francisco?
The best time to visit San Francisco is during September, October, when temperatures average around 21°C and conditions are ideal for sightseeing.
What are the hottest and coldest months in San Francisco?
The hottest month in San Francisco is October with average highs of 22°C, while the coldest is January with average lows of 8°C.
When is the rainy season in San Francisco?
San Francisco sees the most rain in March (9 rainy days), while February is the driest month (0 rainy days).
More San Francisco Guides
Best Time to Visit
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Things to Do
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Itineraries
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Overview
Complete travel guide for San Francisco: top things to do, itineraries, and typical costs.