San Francisco (CA)
January
Weather in San Francisco, California for January 2027
Your guide to San Francisco weather in January - trends and predictions
In general, the average temperature in San Francisco at the beginning of January is 13 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 13.9 °F by the end of January.
San Francisco experiences heavy rainfall in January, with over 20 rainy days and an average total precipitation 104.9 mm.
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Temperatures
Rain 🌧️
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8
Dry days
23
Rainy days
0
Snow days
13°/8°
Temperatures
15 km/h
Avg max wind
75 %
Avg humidity
San Francisco Weather January
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Temperatures trend during January in San Francisco
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January weather in San Francisco day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Jan. 1 |  Sunny | 13° /7° | 4.3 mm | 3 | |
| Jan. 2 |  Patchy rain possible | 13° /8° | 3.1 mm | 3 | |
| Jan. 3 | Light rain shower | 13° /9° | 14.4 mm | 3 | |
| Jan. 4 |  Moderate or heavy rain shower | 13° /8° | 18 mm | 3 | |
| Jan. 5 |  Partly cloudy | 13° /8° | 2.2 mm | 3 | |
| Jan. 6 | Light rain shower | 13° /8° | 1.5 mm | 3 | |
| Jan. 7 | Sunny | 13° /8° | 2 mm | 3 | |
| Jan. 8 |  Overcast | 14° /8° | 3 mm | 3 | |
| Jan. 9 | Sunny | 14° /6° | 4.9 mm | 3 | |
| Jan. 10 | Partly cloudy | 13° /7° | 3.9 mm | 3 | |
| Jan. 11 | Partly cloudy | 14° /6° | 2.7 mm | 4 | |
| Jan. 12 | Sunny | 13° /7° | 0.1 mm | 3 | |
| Jan. 13 | Partly cloudy | 15° /8° | 4.6 mm | 3 | |
| Jan. 14 | Sunny | 15° /8° | 4.7 mm | 4 | |
| Jan. 15 | Partly cloudy | 14° /8° | 2.2 mm | 3 | |
| Jan. 16 | Patchy rain possible | 14° /8° | 3.6 mm | 3 | |
| Jan. 17 |  Cloudy | 14° /8° | 0.1 mm | 3 | |
| Jan. 18 | Partly cloudy | 14° /8° | 0.5 mm | 4 | |
| Jan. 19 | Sunny | 13° /8° | 1.9 mm | 3 | |
| Jan. 20 | Sunny | 15° /7° | 3.3 mm | 4 | |
| Jan. 21 | Sunny | 14° /7° | 0.1 mm | 3 | |
| Jan. 22 | Sunny | 14° /8° | 5.5 mm | 3 | |
| Jan. 23 | Sunny | 14° /6° | 0 mm | 4 | |
| Jan. 24 | Sunny | 13° /7° | 1.4 mm | 3 | |
| Jan. 25 | Sunny | 13° /6° | 0.1 mm | 4 | |
| Jan. 26 | Sunny | 14° /7° | 1.6 mm | 3 | |
| Jan. 27 | Sunny | 15° /7° | 4.1 mm | 4 | |
| Jan. 28 | Overcast | 14° /8° | 2.1 mm | 3 | |
| Jan. 29 | Patchy rain possible | 13° /7° | 0.5 mm | 3 | |
| Jan. 30 | Partly cloudy | 14° /7° | 0 mm | 4 | |
| Jan. 31 |  Moderate rain | 14° /7° | 8.5 mm | 3 | |
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Important Notice
Our weather forecast for San Francisco in January 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 January - FAQ
What are the expected maximum and minimum temperatures in San Francisco during January?
During January, 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 January?
Significant rainfall exceeding 104.9 mm is expected in San Francisco during January, occurring over more than 23 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in San Francisco during January?
The average wind speed in San Francisco during January is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
January rainfall patterns in San Francisco
Explore the daily rainfall trends and prepare for San Franciscos January weather 💧
Typically, San Francisco has 23 rainy days in January with a total of 104.9 mm of rainfall.
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