San Francisco weather in December 2021

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14
14°C max day temperature
5
5 hours of sunshine per day
10
10 days with some rainfall
7
7°C min night temperature
10
10 hours of daylight per day
0
No heat & humidity
97
97 mm of monthly rainfall
2
2 (Low) UV index
12
12°C sea temperature

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The December weather guide for San Francisco, California shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

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How warm is it in San Francisco in December?

Daytime temperatures usually reach 14°C in San Francisco in December, falling to 7°C at night.

How sunny is it in San Francisco in December?

There are normally 5 hours of bright sunshine each day in San Francisco in December - that's 53% of daylight hours.

How warm is the sea around San Francisco in December?

The average sea temperature around San Francisco in December is 12°C.

Does it rain in San Francisco in December?

There are usually 10 days with some rain in San Francisco in December and the average monthly rainfall is 97mm.

San Francisco sunrise & sunset times for December 2021

Browse the sunrise & sunset times for San Francisco in December 2021. Select a month to view San Francisco sunrise & sunset times for the next twelve months.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec