Climate almanac
San Francisco
California, US · 37.77°, -122.42°
What is the climate like in San Francisco?
San Francisco is warmest in September, when daily highs average 69°F (20°C), and coolest in December, when lows fall to about 48°F (9°C). The wettest month is typically January and the driest is August; the year sees roughly 23 in of precipitation.
- Warmest monthSeptember — average high 69°F (20°C)
- Coolest monthDecember — average low 48°F (9°C)
- Wettest monthJanuary (4.7 in)
- Driest monthAugust (0.1 in)
- Annual precipitation23 in