San Francisco: weather and best time to visit
San Francisco (United States) reaches its warmest daytime temperatures in September at around 20°C; the coolest month is December at around 13°C. The sea is warmest in September at about 14°C.
Best time to visit
- 🏖 Beach
- 🏛 City trip
- 🥾 Hiking
Things to do in San Francisco
Tours, tickets and activities for your trip.
San Francisco climate, month by month
| Month | Day °C | Night °C | Sea °C | Rain d | Sun h | Beach | City | Hiking |
|---|---|---|---|---|---|---|---|---|
| Jan | 13° | 6° | 12° | 11 | 7 | 34 | 42 | 69 |
| Feb | 14° | 7° | 12° | 10 | 8 | 42 | 52 | 76 |
| Mar | 15° | 8° | 12° | 10 | 9 | 43 | 56 | 77 |
| Apr | 15° | 9° | 12° | 6 | 11 | 48 | 64 | 84 |
| May | 16° | 10° | 12° | 3 | 13 | 51 | 74 | 89 |
| Jun | 18° | 12° | 12° | 1 | 13 | 55 | 84 | 94 |
| Jul | 18° | 13° | 13° | 0 | 13 | 58 | 88 | 96 |
| Aug | 18° | 13° | 14° | 0 | 12 | 58 | 89 | 96 |
| Sep | 20° | 13° | 14° | 1 | 11 | 61 | 93 | 95 |
| Oct | 19° | 12° | 14° | 3 | 10 | 56 | 85 | 91 |
| Nov | 15° | 9° | 13° | 7 | 8 | 46 | 64 | 83 |
| Dec | 13° | 6° | 12° | 11 | 7 | 35 | 42 | 71 |
Rain d = average rain days per month · Sun h = average sunshine hours per day · scores 0–100, higher is better.
Every month in detail
San Francisco in January
Daytime highs around 13°C, nights near 6°C. It is the rainiest month of the year. Expect about 11 rain days and 7 hours of sunshine per day. The sea is cold at 12°C — not swimming weather.
Beach: poorCity: mixedHiking: goodMore destinations for January →
San Francisco in February
Daytime highs around 14°C, nights near 7°C. Expect about 10 rain days and 8 hours of sunshine per day. The sea is cold at 12°C — not swimming weather.
Beach: mixedCity: mixedHiking: goodMore destinations for February →
San Francisco in March
Daytime highs around 15°C, nights near 8°C. Expect about 10 rain days and 9 hours of sunshine per day. The sea is cold at 12°C — not swimming weather.
Beach: mixedCity: mixedHiking: goodMore destinations for March →
San Francisco in April
Daytime highs around 15°C, nights near 9°C. Expect about 6 rain days and 11 hours of sunshine per day. The sea is cold at 12°C — not swimming weather.
Beach: mixedCity: goodHiking: excellentMore destinations for April →
San Francisco in May
Daytime highs around 16°C, nights near 10°C. Expect about 3 rain days and 13 hours of sunshine per day. The sea is cold at 12°C — not swimming weather.
Beach: mixedCity: goodHiking: excellentMore destinations for May →
San Francisco in June
Daytime highs around 18°C, nights near 12°C. No month gets more sunshine. Expect about 1 rain day and 13 hours of sunshine per day. The sea is cold at 12°C — not swimming weather.
Beach: mixedCity: excellentHiking: excellentMore destinations for June →
San Francisco in July
Daytime highs around 18°C, nights near 13°C. It is also the driest month of the year. Expect about 0 rain days and 13 hours of sunshine per day. The sea is cold at 13°C — not swimming weather.
Beach: mixedCity: excellentHiking: excellentMore destinations for July →
San Francisco in August
Daytime highs around 18°C, nights near 13°C. Expect about 0 rain days and 12 hours of sunshine per day. The sea is cold at 14°C — not swimming weather.
Beach: mixedCity: excellentHiking: excellentMore destinations for August →
San Francisco in September
Daytime highs around 20°C, nights near 13°C. September is the warmest month of the year. The sea is at its warmest now. Expect about 1 rain day and 11 hours of sunshine per day. The sea is cold at 14°C — not swimming weather.
Beach: goodCity: excellentHiking: excellentMore destinations for September →
San Francisco in October
Daytime highs around 19°C, nights near 12°C. Expect about 3 rain days and 10 hours of sunshine per day. The sea is cold at 14°C — not swimming weather.
Beach: mixedCity: excellentHiking: excellentMore destinations for October →
San Francisco in November
Daytime highs around 15°C, nights near 9°C. Expect about 7 rain days and 8 hours of sunshine per day. The sea is cold at 13°C — not swimming weather.
Beach: mixedCity: goodHiking: excellentMore destinations for November →
San Francisco in December
Daytime highs around 13°C, nights near 6°C. December is the coldest month of the year. Expect about 11 rain days and 7 hours of sunshine per day. The sea is cold at 12°C — not swimming weather.
Beach: poorCity: mixedHiking: goodMore destinations for December →
Related destinations
More in United States: Miami Beach · Key West · Orlando · New York City · Santa Monica · San Diego
Similar climate: Cascais, Portugal · Marseille, France · Porto, Portugal · Cusco, Peru