City and County of San Francisco (San Francisco)
December
Weather in City and County of San Francisco for December 2025
Your guide to City and County of San Francisco weather in December - trends and predictions
In general, the average temperature in City and County of San Francisco at the beginning of December is 14 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 12.6 °F by the end of December.
City and County of San Francisco experiences heavy rainfall in December, with over 20 rainy days and an average total precipitation 129.8 mm.
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Temperatures
Rain 🌧️
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5
Dry days
26
Rainy days
0
Snow days
13°/8°
Temperatures
14 km/h
Avg max wind
73 %
Avg humidity
City and County of San Francisco in December average weather
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| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  16° | 2  15° | 3  13° | 4 14° | 5 14° | 6  13° | |
| 7 13° | 8  13° | 9 13° | 10 13° | 11 13° | 12 13° | 13 13° |
| 14 13° | 15 12° | 16 13° | 17 13° | 18 13° | 19 13° | 20 14° |
| 21 13° | 22 14° | 23 14° | 24 14° | 25  13° | 26  13° | 27  13° |
| 28 12° | 29 13° | 30 12° | 31 12° |
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Temperatures trend during December in City and County of San Francisco
See the weather trend as well as the moving average line
December weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Dec. 1 | Cloudy | 16° /9° | 4.9 mm | 4 | |
| Dec. 2 | Sunny | 15° /8° | 0.1 mm | 4 | |
| Dec. 3 | Fog | 13° /8° | 3.2 mm | 4 | |
| Dec. 4 | Sunny | 14° /9° | 0.6 mm | 4 | |
| Dec. 5 | Fog | 14° /9° | 1.1 mm | 4 | |
| Dec. 6 | Partly cloudy | 13° /8° | 3.2 mm | 3 | |
| Dec. 7 | Cloudy | 13° /8° | 1.1 mm | 3 | |
| Dec. 8 | Overcast | 13° /7° | 0.7 mm | 3 | |
| Dec. 9 | Overcast | 13° /6° | 0 mm | 3 | |
| Dec. 10 | Sunny | 13° /7° | 7.9 mm | 4 | |
| Dec. 11 | Overcast | 13° /8° | 3.1 mm | 3 | |
| Dec. 12 | Overcast | 13° /9° | 10.2 mm | 3 | |
| Dec. 13 | Overcast | 13° /8° | 10 mm | 3 | |
| Dec. 14 | Sunny | 13° /7° | 21.1 mm | 4 | |
| Dec. 15 | Partly cloudy | 12° /6° | 1.6 mm | 3 | |
| Dec. 16 | Overcast | 13° /7° | 3.2 mm | 4 | |
| Dec. 17 | Partly cloudy | 13° /7° | 1 mm | 4 | |
| Dec. 18 | Sunny | 13° /6° | 3.8 mm | 4 | |
| Dec. 19 | Sunny | 13° /6° | 3.2 mm | 4 | |
| Dec. 20 | Cloudy | 14° /7° | 5.8 mm | 3 | |
| Dec. 21 | Sunny | 13° /8° | 2.5 mm | 4 | |
| Dec. 22 | Partly cloudy | 14° /9° | 2.2 mm | 4 | |
| Dec. 23 | Sunny | 14° /9° | 2.8 mm | 3 | |
| Dec. 24 | Cloudy | 14° /8° | 13.7 mm | 3 | |
| Dec. 25 | Heavy rain at times | 13° /8° | 3.7 mm | 3 | |
| Dec. 26 | Patchy rain possible | 13° /8° | 2.2 mm | 3 | |
| Dec. 27 | Moderate or heavy rain shower | 13° /8° | 14.9 mm | 3 | |
| Dec. 28 | Patchy rain possible | 12° /8° | 0.9 mm | 3 | |
| Dec. 29 | Sunny | 13° /8° | 7.6 mm | 3 | |
| Dec. 30 | Partly cloudy | 12° /7° | 3.1 mm | 3 | |
| Dec. 31 | Partly cloudy | 12° /7° | 17.5 mm | 3 | |
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Important Notice
Our weather forecast for City and County of San Francisco in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the City and County of San Francisco forecast closer to your planned date for the most up-to-date weather information.
City and County of San Francisco in December - FAQ
What are the expected maximum and minimum temperatures in City and County of San Francisco during December?
During December, expect a variety of temperatures with highs around 13° and lows near 8°, suitable for diverse activities and preferences.
How much rainfall should be expected in City and County of San Francisco during December?
Significant rainfall exceeding 129.8 mm is expected in City and County of San Francisco during December, occurring over more than 26 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in City and County of San Francisco during December?
The average wind speed in City and County of San Francisco during December is 14 km/h, suggesting breezy to windy conditions, depending on your activities.
December rainfall patterns in City and County of San Francisco
Explore the daily rainfall trends and prepare for City and County of San Franciscos December weather 💧
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