Weather in San Jose, California for December 2025
Until now, December 2025 in San Jose has been nearly identical to the historical average, with a temperature of 16.3 °F (showing only a slight deviation of -0.5 °F).
The forecast for the next days in San Jose predicts temperatures to be around 16 °F, close to the historical average.
In general, the average temperature in San Jose at the beginning of December is 17.1 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 14 °F by the end of December.
The climate of San Jose in December is notably wet, with an average of 11 rainy days, and a total of 161 mm of precipitation.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
San Jose Weather December
Temperatures trend during December in San Jose
December weather in San Jose day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Dec. 1 |  Fog | 18° /6° | 0 mm | 4 | |
| Dec. 2 |  Patchy rain possible | 17° /7° | 0 mm | 4 | |
| Dec. 3 | Mist | 17° /7° | 0 mm | 4 | |
| Dec. 4 | Mist | 17° /8° | 0 mm | 5 | |
| Dec. 5 | Mist | 19° /8° | 0 mm | 5 | |
| Dec. 6 |  Light rain | 17° /8° | 1.3 mm | 4 | |
| Dec. 7 | Light rain shower | 15° /7° | 0.3 mm | 4 | |
| Dec. 8 |  Cloudy | 15° /7° | 0 mm | 3 | |
| Dec. 9 |  Partly cloudy | 15° /5° | 0 mm | 4 | |
| Dec. 10 |  Overcast | 18° /5° | 0 mm | 5 | |
| Dec. 11 | Overcast | 17° /7° | 0 mm | 5 | |
| Dec. 12 | Overcast | 16° /9° | 7.8 mm | 4 | |
| Dec. 13 | Fog | 20° /5° | 0 mm | 0.5 | |
| Dec. 14 | Partly cloudy | 23° /11° | 0 mm | 0.5 | |
| Dec. 15 |  Sunny | 17° /10° | 0 mm | 0.4 | |
| Dec. 16 | Sunny | 19° /10° | 0 mm | 0.5 | |
| Dec. 17 | Patchy rain possible | 19° /10° | 0.1 mm | 0 | |
| Dec. 18 | Sunny | 16° /9° | 0 mm | 4 | |
| Dec. 19 | Partly cloudy | 16° /9° | 0 mm | 4 | |
| Dec. 20 | Partly cloudy | 17° /12° | 0 mm | 4 | |
| Dec. 21 |  Moderate rain | 15° /12° | 7.4 mm | 3 | |
| Dec. 22 | Patchy rain possible | 15° /9° | 1.9 mm | 3 | |
| Dec. 23 | Sunny | 11° /4° | 0 mm | 3 | |
| Dec. 24 | Partly cloudy | 12° /4° | 0 mm | 3 | |
| Dec. 25 | Sunny | 14° /6° | 0 mm | 3 | |
| Dec. 26 | Sunny | 15° /5° | 0 mm | 3 | |
| Dec. 27 |  Moderate or heavy rain shower | 15° /10° | 25.1 mm | 3 | |
| Dec. 28 | Partly cloudy | 15° /9° | 0.2 mm | 4 | |
| Dec. 29 |  Heavy rain at times | 13° /8° | 10.8 mm | 3 | |
| Dec. 30 | Moderate or heavy rain shower | 13° /7° | 11.6 mm | 3 | |
| Dec. 31 | Moderate or heavy rain shower | 13° /6° | 17.7 mm | 3 | |
| Next | |||||
San Jose in December - FAQ
December rainfall patterns in San Jose
UV exposure in San Jose during December
Quick links
Where is San Jose?Get accurate weather forecasts for San Jose, located at latitude 37.339 and longitude -121.895. Stay updated with localized weather information tailored for San Jose.