San Francisco Weather in December
What's the weather like in San Francisco (Petén) in December 2024?
The climate in San Francisco during December can be summarized as warm, humid and damp.
December is in the winter in San Francisco and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a muggy 27°C (81°F), whilst at night 18°C (65°F) is normal.
| Daytime temperature | 27.3°C 81.1°F |
|---|---|
| Nightly temperature | 18.2°C 64.7°F |
| Average temperature | 22.7°C 72.9°F |
| Daily sunshine | 6.4 hrs |
| Avg rainfall | 111 mm 4.4 ins |
| Rainy days | 13 days |
| Sea temperature | 27.7°C 81.9°F |
| Humidity | 76% |
| Windspeed | 11.2kph 7 mph |
On average December is the 5th driest month of the year in San Francisco with around 111mm 4.4 inches of rain making it a damp time to visit. This rainfall is typically spread over 13 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.4 hours of sunshine per day.
December temperatures in San Francisco
December rainfall
December hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in San Francisco in December 2024.
Other monthly averages
Best places to visit in December
San Francisco weather stats
| Hottest month: | May | 32.4°C 90.3°F |
|---|---|---|
| Driest month: | April | 48mm 1.9ins |
| Sunniest month: | March | 8.1hrs |
| Coldest month: | January | 26.7°C 80.1°F |
| Wettest month: | September | 286mm 11.3ins |
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