Vacaville (CA)
December
Weather in Vacaville, California for December 2025
Your guide to Vacaville weather in December - trends and predictions
In general, the average temperature in Vacaville at the beginning of December is 16.3 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 12.6 °F by the end of December.
The climate of Vacaville in December is notably wet, with an average of 11 rainy days, and a total of 226.5 mm of precipitation.
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Temperatures
Rain 🌧️
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20
Dry days
11
Rainy days
0
Snow days
13°/6°
Temperatures
12 km/h
Avg max wind
78 %
Avg humidity
Vacaville Weather December
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Temperatures trend during December in Vacaville
See the weather trend as well as the moving average line
December weather in Vacaville day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Dec. 1 |  Overcast | 17° /6° | 0 mm | 4 | |
| Dec. 2 |  Sunny | 17° /5° | 0 mm | 5 | |
| Dec. 3 | Sunny | 17° /5° | 0 mm | 5 | |
| Dec. 4 | Sunny | 17° /5° | 0 mm | 5 | |
| Dec. 5 |  Cloudy | 17° /7° | 0 mm | 4 | |
| Dec. 6 | Cloudy | 16° /5° | 0 mm | 4 | |
| Dec. 7 | Overcast | 13° /4° | 0 mm | 3 | |
| Dec. 8 |  Partly cloudy | 18° /7° | 0 mm | 5 | |
| Dec. 9 | Sunny | 15° /6° | 0 mm | 5 | |
| Dec. 10 | Sunny | 12° /1° | 0 mm | 4 | |
| Dec. 11 | Overcast | 13° /2° | 0 mm | 3 | |
| Dec. 12 |  Moderate or heavy rain shower | 11° /8° | 37.1 mm | 3 | |
| Dec. 13 | Moderate rain at times | 12° /7° | 5.3 mm | 3 | |
| Dec. 14 | Moderate or heavy rain shower | 12° /7° | 97.7 mm | 3 | |
| Dec. 15 | Overcast | 9° /3° | 0 mm | 2 | |
| Dec. 16 | Moderate or heavy rain shower | 8° /4° | 12.3 mm | 2 | |
| Dec. 17 | Overcast | 12° /7° | 0 mm | 3 | |
| Dec. 18 | Overcast | 12° /4° | 0 mm | 3 | |
| Dec. 19 | Overcast | 10° /4° | 0 mm | 3 | |
| Dec. 20 | Overcast | 10° /4° | 0 mm | 3 | |
| Dec. 21 | Moderate or heavy rain shower | 9° /6° | 11.2 mm | 2 | |
| Dec. 22 | Moderate rain at times | 15° /8° | 1.5 mm | 4 | |
| Dec. 23 |  Patchy rain possible | 16° /12° | 0.7 mm | 4 | |
| Dec. 24 | Moderate or heavy rain shower | 13° /8° | 18.2 mm | 3 | |
| Dec. 25 | Overcast | 11° /4° | 0 mm | 3 | |
| Dec. 26 | Moderate or heavy rain shower | 12° /7° | 16.4 mm | 3 | |
| Dec. 27 | Moderate or heavy rain shower | 13° /9° | 18.7 mm | 3 | |
| Dec. 28 | Patchy rain possible | 15° /10° | 0.2 mm | 3 | |
| Dec. 29 | Moderate or heavy rain shower | 14° /7° | 7.2 mm | 3 | |
| Dec. 30 | Cloudy | 12° /4° | 0 mm | 3 | |
| Dec. 31 | Partly cloudy | 11° /1° | 0 mm | 4 | |
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Important Notice
Our weather forecast for Vacaville 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 Vacaville forecast closer to your planned date for the most up-to-date weather information.
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Vacaville in December - FAQ
What are the expected maximum and minimum temperatures in Vacaville during December?
During December, expect a variety of temperatures with highs around 13° and lows near 6°, suitable for diverse activities and preferences.
How much rainfall should be expected in Vacaville during December?
Significant rainfall exceeding 226.5 mm is expected in Vacaville during December, occurring over more than 11 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Vacaville during December?
The average wind speed in Vacaville during December is 12 km/h, suggesting breezy to windy conditions, depending on your activities.
December rainfall patterns in Vacaville
Explore the daily rainfall trends and prepare for Vacavilles December weather 💧
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