San Francisco (CA)
December
Weather in San Francisco, California for December 2026
Your guide to San Francisco weather in December - trends and predictions
In general, the average temperature in San Francisco at the beginning of December is 13.6 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 12.2 °C by the end of December.
The climate of San Francisco in December is notably wet, with an average of 11 rainy days, and a total of 191.5 mm of precipitation.
Is December a good time to visit San Francisco? check out the best time to travel to San Francisco page.
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Temperatures
Rain 🌧️
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20
Dry days
11
Rainy days
0
Snow days
13°/8°
Temperatures
15 km/h
Avg max wind
78 %
Avg humidity
San Francisco Weather December
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Temperatures trend during December in San Francisco
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December weather in San Francisco day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Dec. 1 |  Light rain | 16° /9° | 4 mm | 2.4 | |
| Dec. 2 |  Sunny | 14° /8° | 0.1 mm | 2.3 | |
| Dec. 3 | Light rain | 13° /8° | 2.6 mm | 2.3 | |
| Dec. 4 | Sunny | 14° /9° | 0.4 mm | 2.3 | |
| Dec. 5 |  Fog | 14° /10° | 0.9 mm | 2.3 | |
| Dec. 6 | Light rain | 13° /9° | 2.6 mm | 2.3 | |
| Dec. 7 | Fog | 13° /9° | 0.9 mm | 2.2 | |
| Dec. 8 |  Overcast | 12° /8° | 0.6 mm | 2.2 | |
| Dec. 9 | Overcast | 12° /7° | 0 mm | 2.2 | |
| Dec. 10 | Light rain | 13° /8° | 6.3 mm | 2.2 | |
| Dec. 11 | Light rain | 13° /8° | 2.6 mm | 2.2 | |
| Dec. 12 | Light rain | 13° /9° | 8.5 mm | 2.2 | |
| Dec. 13 | Light rain | 13° /9° | 8.3 mm | 2.2 | |
| Dec. 14 |  Moderate rain | 12° /8° | 17.6 mm | 2.2 | |
| Dec. 15 |  Patchy rain possible | 11° /7° | 1.3 mm | 2.2 | |
| Dec. 16 | Light rain | 13° /8° | 2.6 mm | 2.1 | |
| Dec. 17 | Patchy rain possible | 13° /8° | 1.6 mm | 2.1 | |
| Dec. 18 | Light rain | 12° /7° | 3.1 mm | 2.1 | |
| Dec. 19 | Light rain | 13° /7° | 2.6 mm | 2.1 | |
| Dec. 20 | Light rain | 13° /8° | 8.1 mm | 2.1 | |
| Dec. 21 |  Heavy rain | 13° /9° | 26.7 mm | 2.1 | |
| Dec. 22 | Moderate rain | 14° /10° | 10.6 mm | 2.1 | |
| Dec. 23 | Light rain | 14° /10° | 3.1 mm | 2.1 | |
| Dec. 24 | Moderate rain | 14° /9° | 16.8 mm | 2.1 | |
| Dec. 25 |  Heavy rain at times | 13° /9° | 11 mm | 2.1 | |
| Dec. 26 | Light rain | 13° /9° | 4.3 mm | 2.1 | |
| Dec. 27 | Moderate rain | 13° /9° | 12.8 mm | 2.2 | |
| Dec. 28 | Patchy rain possible | 11° /8° | 0.7 mm | 2.2 | |
| Dec. 29 | Light rain | 13° /8° | 6.3 mm | 2.2 | |
| Dec. 30 | Light rain | 12° /8° | 2.6 mm | 2.2 | |
| Dec. 31 | Moderate rain | 11° /8° | 22 mm | 2.2 | |
| Next | |||||
Important Notice
Our weather forecast for 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 San Francisco forecast closer to your planned date for the most up-to-date weather information.
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San Francisco in December - FAQ
What are the expected maximum and minimum temperatures in 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 San Francisco during December?
Significant rainfall exceeding 191.5 mm is expected in San Francisco during December, occurring over more than 11 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in San Francisco during December?
The average wind speed in San Francisco during December is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
December rainfall patterns in San Francisco
Explore the daily rainfall trends and prepare for San Franciscos December weather 💧
Typically, San Francisco has 11 rainy days in December with a total of 191.5 mm of rainfall.
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