San Francisco weather in December
San Francisco in December averages 11°C (51°F) and 106 mm of rain.
Of the twelve months in San Francisco, December is the second coldest and the wettest.
- Average temp
- 11°C (51°F)
7–14°C · 45–57°F
- Rainfall
- 106 mm
Showers likely
- Sunshine
- —
- Wind
- 12 km/h
What is San Francisco like in December?
Daytime
Days are cool.
Rain
Some rain is likely; pack for showers.
Evening
Evenings are cooler. A layer helps after sunset.
What should I pack for San Francisco in December?
A light rain jacket
About 106 mm falls this month — showers rather than washouts.
A warm mid-layer
Nights drop to around 7°C (45°F).
December compared with November and January
December in San Francisco is 2.6°C cooler than November and 56 mm wetter than it, which averages 13°C (56°F).
December in San Francisco is about the same temperature as January and about as wet as it, which averages 11°C (51°F).
Daylight in San Francisco in December
On 15 December the sun is up for 9 hours 34 minutes in San Francisco, rising about 07:18 and setting about 16:52 local time.
No month in San Francisco has less daylight than December.
Where to stay in San Francisco
Dates are a starting point for December.
Travel guides for San Francisco
What to read before you book.
San Francisco weather by month
TemperatureRainfall
How December compares with the rest of the year
December is highlighted. Every other month links to its own page.
| Month | Average | Rainfall |
|---|---|---|
| January | 11°C / 51°F | 99 mm |
| February | 12°C / 53°F | 100 mm |
| March | 13°C / 55°F | 69 mm |
| April | 14°C / 57°F | 35 mm |
| May | 15°C / 60°F | 13 mm |
| June | 17°C / 62°F | 4 mm |
| July | 18°C / 64°F | 0 mm |
| August | 18°C / 65°F | 1 mm |
| September | 18°C / 65°F | 2 mm |
| October | 17°C / 63°F | 19 mm |
| November | 13°C / 56°F | 50 mm |
| December | 11°C / 51°F | 106 mm |
Similar weather in December
Other destinations whose December averages sit close to this one.
Check another month
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FAQs about San Francisco in December
December climate averages for San Francisco, 1991–2020.
San Francisco averages 11°C (51°F) in December, ranging from about 7°C (45°F) at night to 14°C (57°F) in the afternoon. That is a 1991–2020 average, so an individual week can run either side of it.
Some. About 106 mm falls across December, enough to need a light jacket but not enough to reshape a trip.
They are about the same. December averages 11°C (51°F) and January 11°C (51°F), so temperature alone will not decide between them.
December is 2.6°C cooler than November, and 56 mm wetter.
It is outside the easiest window. The most comfortable stretch here is May to October; December sits outside it, which usually means more heat, more rain, or both — worth it if you would rather have the place to yourself.
This page does not show today's weather. It is a 1991–2020 climate normal from Meteostat — a long-run average of what December is usually like, which is what you want when booking months ahead. For today or the coming week, check a live forecast.
About 9 hours 34 minutes of daylight in mid-December, the least of any month in San Francisco.
On 15 December, sunrise is about 07:18 and sunset about 16:52 local time. Both shift across the month.
