United States · 30-year monthly climate averages
Based on 30 years of climate data, the most comfortable months to visit San Francisco are July, August and September, when daytime temperatures are agreeable and rainfall is relatively low.
San Francisco sees its warmest weather in September, when daytime highs average around 24°C, and its coolest in January (around 15°C).
Annual precipitation totals roughly 499mm — December is typically the wettest month (~105mm) and July the driest (~0mm).
🟧 avg daytime high · 🟦 dashed: avg nighttime low · bars: monthly rainfall
Daily forecast highs vs the 30-year normal — last 60 days
Each bar is one day: orange above normal, blue below.
| Month | High / Low | Rainfall | Travel rating |
|---|---|---|---|
| January | 15° / 7°C | 99mm | 🤔 Fair |
| February | 16° / 8°C | 101mm | 👍 Good |
| March | 17° / 9°C | 69mm | 👍 Good |
| April | 19° / 10°C | 35mm | 🌟 Great |
| May | 20° / 11°C | 12mm | 🌟 Great |
| June | 22° / 12°C | 4mm | 🌟 Great |
| July | 23° / 13°C | 0mm | 🌟 Great |
| August | 23° / 14°C | 1mm | 🌟 Great |
| September | 24° / 13°C | 2mm | 🌟 Great |
| October | 22° / 12°C | 20mm | 🌟 Great |
| November | 18° / 9°C | 52mm | 👍 Good |
| December | 15° / 7°C | 105mm | 🤔 Fair |
January in San Francisco is mild, with average daytime highs around 15°C (58°F) and nighttime lows near 7°C (45°F). Expect roughly 99mm of precipitation spread over about 9 rainy days, with a moderate amount of rain.
🎒 What to pack — light jacket · layers for cool evenings
February in San Francisco is mild, with average daytime highs around 16°C (61°F) and nighttime lows near 8°C (46°F). Expect roughly 101mm of precipitation spread over about 9 rainy days, with a moderate amount of rain.
🎒 What to pack — light jacket · layers for cool evenings
March in San Francisco is mild, with average daytime highs around 17°C (63°F) and nighttime lows near 9°C (47°F). Expect roughly 69mm of precipitation spread over about 9 rainy days, with a moderate amount of rain.
🎒 What to pack — light jacket · layers for cool evenings
April in San Francisco is mild, with average daytime highs around 19°C (66°F) and nighttime lows near 10°C (49°F). Expect roughly 35mm of precipitation spread over about 5 rainy days, with little rainfall.
🎒 What to pack — light jacket · layers for cool evenings
May in San Francisco is pleasantly warm, with average daytime highs around 20°C (68°F) and nighttime lows near 11°C (52°F). Expect roughly 12mm of precipitation spread over about 2 rainy days, and rain is rare.
🎒 What to pack — light layers · comfortable walking shoes
June in San Francisco is pleasantly warm, with average daytime highs around 22°C (71°F) and nighttime lows near 12°C (54°F). Expect roughly 4mm of precipitation spread over about 1 rainy days, and rain is rare.
🎒 What to pack — light layers · comfortable walking shoes
July in San Francisco is pleasantly warm, with average daytime highs around 23°C (73°F) and nighttime lows near 13°C (55°F). Expect roughly 0mm of precipitation spread over about 0 rainy days, and rain is rare.
🎒 What to pack — light layers · comfortable walking shoes
August in San Francisco is pleasantly warm, with average daytime highs around 23°C (73°F) and nighttime lows near 14°C (56°F). Expect roughly 1mm of precipitation spread over about 0 rainy days, and rain is rare.
🎒 What to pack — light layers · comfortable walking shoes
September in San Francisco is pleasantly warm, with average daytime highs around 24°C (75°F) and nighttime lows near 13°C (56°F). Expect roughly 2mm of precipitation spread over about 1 rainy days, and rain is rare.
🎒 What to pack — light layers · comfortable walking shoes
October in San Francisco is pleasantly warm, with average daytime highs around 22°C (72°F) and nighttime lows near 12°C (53°F). Expect roughly 20mm of precipitation spread over about 2 rainy days, with little rainfall.
🎒 What to pack — light layers · comfortable walking shoes
November in San Francisco is mild, with average daytime highs around 18°C (64°F) and nighttime lows near 9°C (49°F). Expect roughly 52mm of precipitation spread over about 5 rainy days, with little rainfall.
🎒 What to pack — light jacket · layers for cool evenings
December in San Francisco is mild, with average daytime highs around 15°C (58°F) and nighttime lows near 7°C (45°F). Expect roughly 105mm of precipitation spread over about 9 rainy days, with a moderate amount of rain.
🎒 What to pack — light jacket · layers for cool evenings