San Francisco weather in December 2026

Q: How hot is it in San Francisco in December?

Daytime temperatures usually reach 20°C in San Francisco in December, falling to 8°C at night.

Q: How sunny is it in San Francisco in December?

There are normally 7 hours of bright sunshine each day in San Francisco in December - that's 69% of daylight hours.

Q: Does it rain in San Francisco in December?

There are usually 5 days with some rain in San Francisco in December and the average monthly rainfall is 53mm.

Expect daytime maximum temperatures of 57°F in San Francisco, California in December based on long-term weather averages. There are 5 hours of sunshine per day on average with 10 days with some rainfall and typically 3.8 inches of rainfall in the month.

57
57°F max day temperature
5
5 hours of sunshine per day
10
10 days with some rainfall
45
45°F min night temperature
10
10 hours of daylight per day
0
No heat & humidity
3.8
3.8 inches of monthly rainfall
2
2 (Low) UV index
54
54°F sea temperature

More about San Francisco

San Francisco by month

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

Recommended for California

TUI: Top deals & discounts on 2026/2027 holidays

Sale

Explore latest special offers & online deals from TUI
Free child places & £0 deposits with direct debit available
Book summer & winter sun holidays in 2026/2027

Go to TUI deal >>

View all TUI offers

TUI deal finder

Destination

The December weather guide for California (San Francisco) 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.

Metric (°C) | Imperial (°F)

More about San Francisco

How hot is it in San Francisco in December?

Daytime temperatures usually reach 68°F in San Francisco in December, falling to 46°F at night.

How sunny is it in San Francisco in December?

There are normally 7 hours of bright sunshine each day in San Francisco in December - that's 69% of daylight hours.

Does it rain in San Francisco in December?

There are usually 5 days with some rain in San Francisco in December and the average monthly rainfall is 2.1 inches.

San Francisco December sunrise & sunset times

Browse the sunrise and sunset times for San Francisco in December 2026. Select a month to view San Francisco sunrise and sunset times for the next 12 months.

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