San Jose
December
Weather in San Jose for December 2025
Your guide to San Jose weather in December - trends and predictions
In general, the average temperature in San Jose at the beginning of December is 17.3 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 14.1 °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
20
Dry days
11
Rainy days
0
Snow days
15°/8°
Temperatures
9 km/h
Avg max wind
71 %
Avg humidity
San Jose Weather December
Move between months or click on a day
| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  18° | 2  17° | 3 17° | 4 17° | 5 20° | 6  17° | |
| 7 15° | 8  15° | 9  15° | 10  17° | 11 16° | 12 14° | 13 15° |
| 14 15° | 15  15° | 16 15° | 17 17° | 18 15° | 19 17° | 20 15° |
| 21 15° | 22 17° | 23 16° | 24 16° | 25 15° | 26 15° | 27  15° |
| 28 15° | 29  13° | 30 13° | 31 13° |
You can click on date
Access San Jose weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Temperatures trend during December in San Jose
See the weather trend as well as the moving average line
December weather day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Dec. 1 | Fog | 18° /8° | 0 mm | 4 | |
| Dec. 2 | Patchy rain possible | 17° /8° | 0 mm | 5 | |
| Dec. 3 | Mist | 17° /8° | 0 mm | 5 | |
| Dec. 4 | Mist | 17° /9° | 0 mm | 5 | |
| Dec. 5 | Mist | 20° /9° | 0 mm | 5 | |
| Dec. 6 | Light rain | 17° /9° | 1.9 mm | 5 | |
| Dec. 7 | Light rain shower | 15° /8° | 0.5 mm | 4 | |
| Dec. 8 | Cloudy | 15° /7° | 0 mm | 4 | |
| Dec. 9 | Partly cloudy | 15° /4° | 0 mm | 4 | |
| Dec. 10 | Overcast | 17° /4° | 0 mm | 5 | |
| Dec. 11 | Overcast | 16° /7° | 0 mm | 5 | |
| Dec. 12 | Overcast | 14° /8° | 11.7 mm | 4 | |
| Dec. 13 | Overcast | 15° /7° | 0 mm | 4 | |
| Dec. 14 | Overcast | 15° /8° | 33.1 mm | 4 | |
| Dec. 15 | Sunny | 15° /6° | 0 mm | 4 | |
| Dec. 16 | Partly cloudy | 15° /7° | 0 mm | 5 | |
| Dec. 17 | Patchy rain possible | 17° /8° | 0 mm | 4 | |
| Dec. 18 | Light rain shower | 15° /9° | 6.3 mm | 4 | |
| Dec. 19 | Light rain shower | 17° /10° | 9.6 mm | 5 | |
| Dec. 20 | Light rain shower | 15° /11° | 12.8 mm | 4 | |
| Dec. 21 | Partly cloudy | 15° /9° | 0 mm | 4 | |
| Dec. 22 | Partly cloudy | 17° /9° | 0 mm | 5 | |
| Dec. 23 | Partly cloudy | 16° /8° | 0 mm | 5 | |
| Dec. 24 | Sunny | 16° /8° | 19.4 mm | 4 | |
| Dec. 25 | Overcast | 15° /7° | 0 mm | 4 | |
| Dec. 26 | Overcast | 15° /8° | 0.3 mm | 4 | |
| 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 | |||||
Important Notice
Our weather forecast for San Jose 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 Jose forecast closer to your planned date for the most up-to-date weather information.
San Jose in December - FAQ
What are the expected maximum and minimum temperatures in San Jose during December?
During December, expect a variety of temperatures with highs around 15° and lows near 8°, suitable for diverse activities and preferences.
How much rainfall should be expected in San Jose during December?
Significant rainfall exceeding 161 mm is expected in San Jose 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 Jose during December?
The average wind speed in San Jose during December is 9 km/h, suggesting breezy to windy conditions, depending on your activities.
December rainfall patterns in San Jose
Explore the daily rainfall trends and prepare for San Joses December weather 💧
Quick links
You are here
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.
Related locations
Select a location for accurate weather forecast
More Locations Found a mistake?
We appreciate your attention to details. Tell us here.