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.

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.

Metric (°C / mm) | Imperial (°F / inches)

San Francisco sunrise & sunset times for December 2021

Browse the sunrise and sunset times for San Francisco in December 2021. Select a month to view San Francisco sunrise & sunset times for the next 12 months.

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