San Francisco Weather in January
United States · 30-year monthly averages
🤔 Fair time to visit
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.
Avg high
15°C
58°F
Avg low
7°C
45°F
Rainfall
99mm
moderate
Rainy days
9
days with ≥1mm
🎒 What to pack
- light jacket
- layers for cool evenings
January vs the rest of the year
FAQ
- How hot is San Francisco in January?
- 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.
- Does it rain a lot in San Francisco in January?
- San Francisco sees around 99mm of precipitation in January on average — moderate by global standards.
- Is January a good time to visit San Francisco?
- January is a workable month to visit San Francisco, but expect some weather trade-offs.