San Francisco Weather in December
United States · 30-year monthly averages
🤔 Fair time to visit
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.
Avg high
15°C
58°F
Avg low
7°C
45°F
Rainfall
105mm
moderate
Rainy days
9
days with ≥1mm
🎒 What to pack
- light jacket
- layers for cool evenings
December vs the rest of the year
FAQ
- How hot is San Francisco in December?
- 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.
- Does it rain a lot in San Francisco in December?
- San Francisco sees around 105mm of precipitation in December on average — moderate by global standards.
- Is December a good time to visit San Francisco?
- December is a workable month to visit San Francisco, but expect some weather trade-offs.