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United States weather

Weather in Vacaville, California for December 2025

Your guide to Vacaville weather in December - trends and predictions

    Temperatures

  • Until now, December 2025 in Vacaville has been nearly identical to the historical average, with a temperature of 15.7 °F (showing only a slight deviation of -0.4 °F).

  • Expect cooler weather in the next days in Vacaville with the forecast suggesting a temperature of 14.8 °F, lower than the historical average.

  • In general, the average temperature in Vacaville at the beginning of December is 16.4 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 12.6 °F by the end of December.

    • Rain 🌧️

  • 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.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
20
Dry days
Average rainy days
11
Rainy days
Average snowy days
0
Snow days
Average temperatures
13°/6°
Temperatures
Average wind speed
12 km/h
Avg max wind
Average humidity
78 %
Avg humidity

Vacaville Weather December

Move between months or click on a day
November
January
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Overcast
16°
2
Sunny
18°
3
Sunny
17°
4
Sunny
16°
5
Cloudy
16°
6
Cloudy
18°
7
Overcast
14°
8
Partly cloudy
15°
9
Sunny
15°
10
Sunny
16°
11
Fog
10°
12
Partly cloudy
18°
13
Sunny
19°
14
Sunny
20°
15
Sunny
18°
16
Patchy rain possible
20°
17
Patchy rain possible
18°
18
Partly cloudy
15°
19
Sunny
14°
20
Partly cloudy
13°
21
Moderate rain
8°
22
Moderate rain
12°
23
Patchy rain possible
11°
24
Patchy rain possible
11°
25
Overcast
11°
26
Moderate or heavy rain shower
12°
27
Moderate or heavy rain shower
13°
28
Patchy rain possible
15°
29
Moderate or heavy rain shower
14°
30
Cloudy
12°
31
Partly cloudy
11°

Temperatures trend during December in Vacaville

See the weather trend as well as the moving average line

December weather in Vacaville day by day

Click on a date for more information
November January
Date Weather Temperatures Rain UV More
Dec. 1 Overcast
Overcast
 16° /5° 0 mm 5
Dec. 2 Sunny
Sunny
 18° /5° 0 mm 5
Dec. 3 Sunny
Sunny
 17° /5° 0 mm 5
Dec. 4 Sunny
Sunny
 16° /4° 0 mm 5
Dec. 5 Cloudy
Cloudy
 16° /6° 0 mm 4
Dec. 6 Cloudy
Cloudy
 18° /5° 0 mm 5
Dec. 7 Overcast
Overcast
 14° /4° 0 mm 4
Dec. 8 Partly cloudy
Partly cloudy
 15° /6° 0 mm 4
Dec. 9 Sunny
Sunny
 15° /5° 0 mm 4
Dec. 10 Sunny
Sunny
 16° /3° 0 mm 5
Dec. 11 Fog
Fog
 10° /5° 0 mm 0.4
Dec. 12 Partly cloudy
Partly cloudy
 18° /3° 0 mm 0.4
Dec. 13 Sunny
Sunny
 19° /7° 0 mm 0.4
Dec. 14 Sunny
Sunny
 20° /7° 0 mm 0.4
Dec. 15 Sunny
Sunny
 18° /8° 0 mm 0.4
Dec. 16 Patchy rain possible
Patchy rain possible
 20° /10° 0.2 mm 0
Dec. 17 Patchy rain possible
Patchy rain possible
 18° /9° 0.1 mm 3
Dec. 18 Partly cloudy
Partly cloudy
 15° /8° 0.1 mm 4
Dec. 19 Sunny
Sunny
 14° /5° 0 mm 3
Dec. 20 Partly cloudy
Partly cloudy
 13° /5° 0 mm 3
Dec. 21 Moderate rain
Moderate rain
 8° /6° 6.7 mm 2
Dec. 22 Moderate rain
Moderate rain
 12° /8° 9.9 mm 3
Dec. 23 Patchy rain possible
Patchy rain possible
 11° /5° 0.9 mm 2
Dec. 24 Patchy rain possible
Patchy rain possible
 11° /5° 0.8 mm 2
Dec. 25 Overcast
Overcast
 11° /4° 0 mm 3
Dec. 26 Moderate or heavy rain shower
Moderate or heavy rain shower
 12° /7° 16.4 mm 3
Dec. 27 Moderate or heavy rain shower
Moderate or heavy rain shower
 13° /9° 18.7 mm 3
Dec. 28 Patchy rain possible
Patchy rain possible
 15° /10° 0.2 mm 3
Dec. 29 Moderate or heavy rain shower
Moderate or heavy rain shower
 14° /7° 7.2 mm 3
Dec. 30 Cloudy
Cloudy
 12° /4° 0 mm 3
Dec. 31 Partly cloudy
Partly cloudy
 11° /1° 0 mm 4
Next
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 💧
Typically, Vacaville has 11 rainy days in December with a total of 226.5 mm of rainfall.

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Location coordinates Where is Vacaville?

Get accurate weather forecasts for Vacaville, located at latitude 38.357 and longitude -121.988. Stay updated with localized weather information tailored for Vacaville.

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