Temperature
Cool by day, brisk at night.
58°Ftypical December high
Typical range
December climate
December in San Francisco
United States · North America
Cool days.
Good overall
Daytime high
58°F
Lows around 48°F
Rain
Several rainy days
Sun
5 h/day
Air feel
Very dry
Sea temp
55°F
Too cold for swimming
When to visit
Month-by-month fit
Best
Precipitation
Several rainy days. About 10 wet days, the highest monthly average.
32%wet-day frequency
AmountWet-day chance
Sunshine
A mix of sunshine and cloud.
5.1 hDecember sunshine
Heat & humidity by month
Very dryDecember Heat feel
Air-feel chart data is currently unavailable
Clear sky
Mostly cloudy skies this month.
39%December Clear sky
Clear skyCloud
Sea temperature
55°FDecember sea temp
Data tableView month-by-month numbers
View month-by-month numbers
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% | Sea°F |
|---|---|---|---|---|---|---|---|
| Jan | 58 | 47 | 4.2 | 9 | 5.9 | 82 | 55 |
| Feb | 61 | 48 | 4.5 | 10 | 7.5 | 80 | 54 |
| Mar | 62 | 49 | 2.9 | 9 | 8.0 | 79 | 54 |
| Apr | 63 | 50 | 1.5 | 5 | 9.9 | 77 | 53 |
| May | 64 | 51 | 0.7 | 2 | 10.9 | 78 | 54 |
| Jun | 66 | 53 | 0.2 | 1 | 12.1 | 79 | 55 |
| Jul | 66 | 54 | 0.0 | 0 | 11.7 | 83 | 56 |
| Aug | 68 | 56 | 0.0 | 0 | 10.8 | 83 | 58 |
| Sep | 70 | 56 | 0.1 | 1 | 9.9 | 80 | 59 |
| Oct | 70 | 55 | 1.1 | 3 | 8.9 | 77 | 58 |
| Nov | 64 | 51 | 2.5 | 6 | 7.1 | 80 | 57 |
| Dec | 58 | 48 | 5.2 | 10 | 5.1 | 81 | 55 |
Similar climates
Similar
Similar travel styleLos AngelesUnited StatesSimilar travel styleBarcelonaSpainSimilar travel styleLisbonPortugalSimilar travel styleNiceFrance
Want a side-by-side climate view? Compare San Francisco with Los Angeles.
Climate data notePlanning guidance, not a forecast
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: modeled climate estimate, not measured bright-sunshine duration.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Oct 7, 2026
Data & methodology