San Jose (CA)
January
Weather in San Jose, California for January 2027
Your guide to San Jose weather in January - trends and predictions
In general, the average temperature in San Jose at the beginning of January is 13.2 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 15.2 °C by the end of January.
San Jose experiences moderate rainfall in January, with an average of 9 rainy days and a total precipitation of 139.2 mm.
Is January a good time to visit San Jose? check out the best time to travel to San Jose page.
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Temperatures
Rain 🌧️
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22
Dry days
9
Rainy days
0
Snow days
14°/6°
Temperatures
11 km/h
Avg max wind
75 %
Avg humidity
San Jose Weather January
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Temperatures trend during January in San Jose
See the weather trend as well as the moving average line
January weather in San Jose day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Jan. 1 |  Patchy rain possible | 14° /8° | 1.4 mm | 2.3 | |
| Jan. 2 |  Light rain | 14° /8° | 2.7 mm | 2.3 | |
| Jan. 3 |  Moderate rain | 13° /9° | 11.1 mm | 2 | |
| Jan. 4 |  Heavy rain | 12° /7° | 27.2 mm | 2.3 | |
| Jan. 5 |  Moderate or heavy rain shower | 13° /7° | 6 mm | 2.3 | |
| Jan. 6 | Light rain | 14° /6° | 3.2 mm | 2.4 | |
| Jan. 7 | Light rain | 12° /7° | 4.4 mm | 2.4 | |
| Jan. 8 | Light rain | 13° /6° | 5 mm | 2.4 | |
| Jan. 9 | Moderate rain | 15° /6° | 10.5 mm | 2.4 | |
| Jan. 10 | Moderate or heavy rain shower | 13° /6° | 8.5 mm | 2.4 | |
| Jan. 11 | Moderate or heavy rain shower | 14° /5° | 7 mm | 2.5 | |
| Jan. 12 |  Sunny | 14° /5° | 0 mm | 2.5 | |
| Jan. 13 | Moderate or heavy rain shower | 15° /6° | 7.7 mm | 2.5 | |
| Jan. 14 | Moderate rain | 16° /7° | 10.5 mm | 2.6 | |
| Jan. 15 | Light rain | 16° /7° | 4.6 mm | 2.6 | |
| Jan. 16 | Light rain | 16° /8° | 4.6 mm | 2.6 | |
| Jan. 17 |  Overcast | 15° /7° | 0.1 mm | 2.6 | |
| Jan. 18 | Overcast | 15° /6° | 0.1 mm | 2.7 | |
| Jan. 19 | Light rain | 14° /5° | 3.2 mm | 2.7 | |
| Jan. 20 | Patchy rain possible | 14° /6° | 1.2 mm | 2.7 | |
| Jan. 21 | Sunny | 14° /6° | 0 mm | 2.8 | |
| Jan. 22 | Light rain | 14° /6° | 7.1 mm | 2.8 | |
| Jan. 23 | Sunny | 15° /6° | 0 mm | 2.9 | |
| Jan. 24 | Sunny | 14° /6° | 0.7 mm | 2.9 | |
| Jan. 25 |  Mist | 15° /5° | 0 mm | 2.9 | |
| Jan. 26 | Sunny | 16° /6° | 0.4 mm | 3 | |
| Jan. 27 | Sunny | 16° /6° | 0 mm | 3 | |
| Jan. 28 | Sunny | 16° /7° | 0 mm | 3.1 | |
| Jan. 29 | Mist | 13° /6° | 0.2 mm | 3 | |
| Jan. 30 |  Cloudy | 15° /7° | 0 mm | 3 | |
| Jan. 31 | Moderate rain | 15° /8° | 11.7 mm | 3 | |
| Next | |||||
Important Notice
Our weather forecast for San Jose 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 Jose forecast closer to your planned date for the most up-to-date weather information.
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San Jose in January - FAQ
What are the expected maximum and minimum temperatures in San Jose during January?
During January, expect a variety of temperatures with highs around 14° and lows near 6°, suitable for diverse activities and preferences.
How much rainfall should be expected in San Jose during January?
Significant rainfall exceeding 139.2 mm is expected in San Jose during January, occurring over more than 9 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in San Jose during January?
The average wind speed in San Jose during January is 11 km/h, suggesting breezy to windy conditions, depending on your activities.
January rainfall patterns in San Jose
Explore the daily rainfall trends and prepare for San Joses January weather 💧
Typically, San Jose has 9 rainy days in January with a total of 139.2 mm of rainfall.
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