San Francisco, CA Weather
San Francisco hourly forecast: next 24 hours
Today's high of 68°F (20°C) is right in line with the typical July high of 67°F (19°C).
Current conditions in detail
San Francisco weather tomorrow (Saturday, July 18)
Tomorrow in San Francisco looks sunny, with a high of 64° and an overnight low of 56°. Precipitation chance is modest at 17%. Winds top out near 13 mph, and the UV index reaches 10 (very high).
San Francisco 14-day forecast
About the weather in San Francisco
Located in California, United States, San Francisco experiences a oceanic climate with mild temperatures year-round with regular rainfall. Afternoon temperatures peak near 70°F (21°C) in September and dip to about 56°F (14°C) in December, with around 22.9 inches (581 mm) of precipitation falling across the year.
San Francisco weather: quick facts
- Hottest month: September - highs near 70°F (21°C)
- Coldest month: December - highs near 56°F (14°C)
- Record high: 101°F (38°C) · Record low: 33°F (0°C) (2015–2024)
- Wettest month: December (10 rainy days) · Sunniest: June (13.3 h sun/day)
- Climate type: oceanic - mild temperatures year-round with regular rainfall
Temperatures through the year
The warmest stretch of the year centers on September. Highs average 70°F (21°C) and overnight lows stay near 58°F (14°C). The coolest month is December, with typical highs of 56°F (14°C) and lows around 46°F (8°C). Based on 2015–2024 weather data, temperatures have reached as high as 101°F (38°C) and dropped as low as 33°F (0°C).
Rain, sun and snow
December is usually the wettest month. It brings about 5.1 inches (129 mm) of rain over 10 days, while August is the driest. June brings the most sunshine, averaging 13.3 hours of sun a day.
Season by season
Spring (March through May)
Spring in San Francisco is crisp but comfortable, with daytime highs averaging 61°F (16°C) and nights around 50°F (10°C); rain falls on about 17 days over the three months.
Summer (June through August)
Summer in San Francisco is crisp but comfortable, with daytime highs averaging 67°F (20°C) and nights around 56°F (13°C); precipitation is infrequent.
Fall (September through November)
Fall in San Francisco stays on the cool side of mild, with daytime highs averaging 67°F (19°C) and nights around 54°F (12°C); rain falls on about 10 days over the three months.
Winter (December through February)
Winter in San Francisco is crisp but comfortable, with daytime highs averaging 57°F (14°C) and nights around 46°F (8°C); expect showers on roughly 28 days across the season.
Average temperatures in San Francisco by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 57° | 46° | 10 | 4.9 in | 7.0 h/day | 83% |
| February | 59° | 46° | 8 | 3.5 in | 8.9 h/day | 78% |
| March | 59° | 48° | 10 | 3.7 in | 9.4 h/day | 78% |
| April | 61° | 50° | 5 | 1.3 in | 11.4 h/day | 77% |
| May | 63° | 52° | 2 | 0.7 in | 12.7 h/day | 77% |
| June | 67° | 55° | 0 | 0.1 in | 13.3 h/day | 76% |
| July | 67° | 56° | 0 | 0.0 in | 13.1 h/day | 80% |
| August | 68° | 58° | 0 | 0.0 in | 12.3 h/day | 81% |
| September | 70° | 58° | 1 | 0.1 in | 11.4 h/day | 77% |
| October | 69° | 55° | 3 | 1.1 in | 9.8 h/day | 74% |
| November | 62° | 50° | 7 | 2.3 in | 8.5 h/day | 77% |
| December | 56° | 46° | 10 | 5.1 in | 6.7 h/day | 81% |