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United States weather

Weather in Fairfield, California for December 2025

Your guide to Fairfield weather in December - trends and predictions

    Temperatures

  • Until now, December 2025 in Fairfield has been nearly identical to the historical average, with a temperature of 15.1 °F (showing only a slight deviation of -0.2 °F).

  • Expect cooler weather in the next days in Fairfield with the forecast suggesting a temperature of 13.9 °F, lower than the historical average.

  • In general, the average temperature in Fairfield at the beginning of December is 15.9 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 11.9 °F by the end of December.

    • Rain 🌧️

  • The climate of Fairfield in December is notably wet, with an average of 11 rainy days, and a total of 225 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
10 km/h
Avg max wind
Average humidity
80 %
Avg humidity

Fairfield Weather December

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

Temperatures trend during December in Fairfield

See the weather trend as well as the moving average line

December weather in Fairfield 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
 17° /6° 0 mm 5
Dec. 3 Partly cloudy
Partly cloudy
 17° /6° 0 mm 5
Dec. 4 Sunny
Sunny
 16° /5° 0 mm 5
Dec. 5 Overcast
Overcast
 15° /6° 0 mm 4
Dec. 6 Overcast
Overcast
 17° /7° 0 mm 4
Dec. 7 Overcast
Overcast
 13° /5° 0 mm 3
Dec. 8 Cloudy
Cloudy
 14° /6° 0 mm 4
Dec. 9 Sunny
Sunny
 14° /6° 0 mm 4
Dec. 10 Sunny
Sunny
 15° /3° 0 mm 4
Dec. 11 Overcast
Overcast
 14° /3° 0 mm 3
Dec. 12 Moderate or heavy rain shower
Moderate or heavy rain shower
 15° /6° 15.5 mm 4
Dec. 13 Heavy rain at times
Heavy rain at times
 15° /7° 3.2 mm 4
Dec. 14 Moderate or heavy rain shower
Moderate or heavy rain shower
 14° /5° 46.7 mm 4
Dec. 15 Fog
Fog
 11° /5° 0 mm 0.4
Dec. 16 Overcast
Overcast
 15° /4° 0 mm 0.4
Dec. 17 Overcast
Overcast
 17° /12° 0 mm 0.4
Dec. 18 Mist
Mist
 15° /9° 0 mm 0.4
Dec. 19 Patchy rain possible
Patchy rain possible
 17° /10° 0.1 mm 0.4
Dec. 20 Patchy rain possible
Patchy rain possible
 18° /12° 4.5 mm 0
Dec. 21 Patchy rain possible
Patchy rain possible
 16° /14° 2.5 mm 3
Dec. 22 Moderate rain
Moderate rain
 15° /11° 14 mm 3
Dec. 23 Partly cloudy
Partly cloudy
 12° /7° 0 mm 3
Dec. 24 Patchy rain possible
Patchy rain possible
 11° /7° 4.2 mm 2
Dec. 25 Partly cloudy
Partly cloudy
 12° /6° 0 mm 3
Dec. 26 Sunny
Sunny
 12° /5° 0 mm 3
Dec. 27 Patchy rain possible
Patchy rain possible
 10° /6° 2.4 mm 2
Dec. 28 Patchy rain possible
Patchy rain possible
 13° /7° 3.1 mm 2
Dec. 29 Moderate or heavy rain shower
Moderate or heavy rain shower
 14° /8° 9 mm 3
Dec. 30 Cloudy
Cloudy
 13° /4° 0 mm 3
Dec. 31 Mist
Mist
 9° /0° 0 mm 2
Next
Important Notice
Our weather forecast for Fairfield 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 Fairfield forecast closer to your planned date for the most up-to-date weather information.
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Fairfield in December - FAQ

What are the expected maximum and minimum temperatures in Fairfield 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 Fairfield during December?
Significant rainfall exceeding 225 mm is expected in Fairfield during December, occurring over more than 11 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Fairfield during December?
The average wind speed in Fairfield during December is 10 km/h, suggesting breezy to windy conditions, depending on your activities.

December rainfall patterns in Fairfield

Explore the daily rainfall trends and prepare for Fairfields December weather 💧
Typically, Fairfield has 11 rainy days in December with a total of 225 mm of rainfall.

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Location coordinates Where is Fairfield?

Get accurate weather forecasts for Fairfield, located at latitude 38.249 and longitude -122.04. Stay updated with localized weather information tailored for Fairfield.

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