Best time to visit San Francisco
The best months to visit San Francisco are September, July and August, based on month-by-month temperature and rainfall data. The full year of weather, daylight, holidays, and festival timing is below.
September, July and August score best for San Francisco weather:
- July23° / 13°CJuly is dry but often foggy, so bring layers for Fisherman's Wharf, Golden Gate Bridge, and Outside Lands lead-up visits.
- August23° / 14°CAugust stays dry and fog-influenced, with Outside Lands in Golden Gate Park and warmer inland day trips.
- September24° / 13°CSeptember is the warmest month, excellent for Alcatraz, bay cruises, North Beach, and late Golden Gate Park walks.
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By TripSapien Research · Updated May 20, 2026
San Francisco weather by month
| Month | High | Low | Rain (mm) | Rainy days | Daylight | Sea |
|---|---|---|---|---|---|---|
| January | 15° | 7° | 100 | 12 | 10h | 12° |
| February | 16° | 8° | 95 | 11 | 11h | 12° |
| March | 18° | 9° | 65 | 11 | 12h | 12° |
| April | 19° | 9° | 40 | 7 | 13h | 14° |
| May | 21° | 11° | 12 | 5 | 14h | 14° |
| June | 22° | 12° | 4 | 2 | 15h | 14° |
| JulyBest weather | 23° | 13° | 0 | 1 | 14h | 15° |
| AugustBest weather | 23° | 14° | 1 | 2 | 14h | 16° |
| SeptemberBest weather | 24° | 13° | 2 | 2 | 12h | 18° |
| October | 23° | 12° | 20 | 4 | 11h | 17° |
| November | 18° | 9° | 50 | 8 | 10h | 15° |
| December | 15° | 7° | 105 | 11 | 9h | 13° |
Temperatures in °C. Long-term monthly averages.
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San Francisco month by month
January
San Francisco in January: 14.6°C high, 6.8°C low, 100mm rain over 12 days, 9.7h daylight. Mild but rainy — flexible plans pay off.
Chinese New Year Festivities
February
San Francisco in February: 16.1°C high, 7.7°C low, 95mm rain over 11 days, 10.6h daylight. Mild and dry — shoulder-season sweet spot.
Chinese New Year Festivities
March
San Francisco in March: 17.7°C high, 8.5°C low, 65mm rain over 11 days, 11.7h daylight. Mild and dry — shoulder-season sweet spot.
Easter Parade and Spring Celebration
April
San Francisco in April: 19°C high, 9.4°C low, 40mm rain over 7 days, 13h daylight. Mild and dry — shoulder-season sweet spot.
Cherry Blossom Festival · San Francisco International Film Festival · Easter Parade and Spring Celebration
May
San Francisco in May: 20.5°C high, 10.9°C low, 12mm rain over 5 days, 14h daylight. Mild and dry — shoulder-season sweet spot.
Bay to Breakers
June
San Francisco in June: 22.4°C high, 12°C low, 4mm rain over 2 days, 14.6h daylight. Mild and dry — shoulder-season sweet spot.
Union Street Art Festival · Haight Ashbury Street Fair · San Francisco Lesbian, Gay, Bisexual, Transgender Pride Parade and Celebration
JulyBest weather
San Francisco in July: 22.8°C high, 13°C low, 0mm rain over 1 days, 14.4h daylight. Mild and dry — shoulder-season sweet spot.
Fourth of July
AugustBest weather
San Francisco in August: 23.2°C high, 13.5°C low, 1mm rain over 2 days, 13.5h daylight. Mild and dry — shoulder-season sweet spot.
SeptemberBest weather
San Francisco in September: 24.2°C high, 13.3°C low, 2mm rain over 2 days, 12.2h daylight. Mild and dry — shoulder-season sweet spot.
Fringe Festival · Folsom Street Fair
October
San Francisco in October: 22.8°C high, 11.9°C low, 20mm rain over 4 days, 11h daylight. Mild and dry — shoulder-season sweet spot.
Halloween in the Castro · Fleet Week
November
San Francisco in November: 18.1°C high, 9.1°C low, 50mm rain over 8 days, 9.9h daylight. Mild and dry — shoulder-season sweet spot.
December
San Francisco in December: 14.7°C high, 6.9°C low, 105mm rain over 11 days, 9.4h daylight. Mild but rainy — flexible plans pay off.
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