City and County of San Francisco (San Francisco)
December
Weather in City and County of San Francisco, California for December 2025
Your guide to City and County of San Francisco weather in December - trends and predictions
Until now, December 2025 in City and County of San Francisco is slightly cooler than the historical average by -0.8 °F.
The forecast for the next days in City and County of San Francisco predicts temperatures to be around 13 °F, close to the historical average.
In general, the average temperature in City and County of San Francisco at the beginning of December is 13.9 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 12.1 °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 156.8 mm.
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Temperatures
Rain 🌧️
More
5
Dry days
26
Rainy days
0
Snow days
13°/8°
Temperatures
15 km/h
Avg max wind
76 %
Avg humidity
City and County of San Francisco Weather December
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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 in City and County of San Francisco day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Dec. 1 |  Cloudy | 16° /8° | 4 mm | 4 | |
| Dec. 2 |  Sunny | 14° /8° | 0.1 mm | 4 | |
| Dec. 3 |  Fog | 13° /8° | 2.6 mm | 4 | |
| Dec. 4 | Sunny | 14° /9° | 0.4 mm | 4 | |
| Dec. 5 | Fog | 14° /9° | 0.9 mm | 4 | |
| Dec. 6 | Fog | 13° /9° | 2.6 mm | 3 | |
| Dec. 7 | Fog | 13° /8° | 0.9 mm | 3 | |
| Dec. 8 |  Overcast | 12° /7° | 0.6 mm | 3 | |
| Dec. 9 | Overcast | 13° /7° | 0 mm | 3 | |
| Dec. 10 | Sunny | 13° /7° | 6.3 mm | 3 | |
| Dec. 11 | Overcast | 13° /8° | 2.6 mm | 3 | |
| Dec. 12 | Overcast | 14° /8° | 8.5 mm | 4 | |
| Dec. 13 | Overcast | 13° /8° | 8.3 mm | 3 | |
| Dec. 14 | Sunny | 12° /7° | 17.6 mm | 4 | |
| Dec. 15 | Fog | 12° /6° | 1.3 mm | 3 | |
| Dec. 16 | Overcast | 14° /7° | 2.6 mm | 4 | |
| Dec. 17 |  Patchy rain possible | 16° /10° | 2.8 mm | 0.3 | |
| Dec. 18 | Fog | 12° /9° | 0 mm | 0.4 | |
| Dec. 19 | Mist | 14° /12° | 0 mm | 0.4 | |
| Dec. 20 |  Moderate rain | 16° /13° | 9.1 mm | 0.2 | |
| Dec. 21 | Patchy rain possible | 15° /14° | 1.7 mm | 0 | |
| Dec. 22 | Overcast | 15° /13° | 0 mm | 3 | |
| Dec. 23 | Patchy rain possible | 14° /11° | 1.6 mm | 3 | |
| Dec. 24 |  Partly cloudy | 12° /10° | 0 mm | 4 | |
| Dec. 25 | Patchy rain possible | 10° /8° | 1.6 mm | 2 | |
| Dec. 26 | Patchy rain possible | 12° /9° | 1 mm | 3 | |
| Dec. 27 | Patchy rain possible | 13° /11° | 0.1 mm | 3 | |
| Dec. 28 | Partly cloudy | 12° /10° | 0 mm | 4 | |
| Dec. 29 | Partly cloudy | 13° /9° | 0 mm | 4 | |
| Dec. 30 | Moderate rain | 13° /11° | 6.4 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.
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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 156.8 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 15 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 💧
Typically, City and County of San Francisco has 26 rainy days in December with a total of 156.8 mm of rainfall.
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