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United States weather

Weather in Fairfax, Virginia for December 2025

Your guide to Fairfax weather in December - trends and predictions

    Snow Forecast ❄️

  • With an average of 2 snowy days, Fairfax usually enjoys a light touch of snow in December.
    According to Fairfax snow forecast for December 2025, no snow is expected until the end of the month.

    • Temperatures

  • Until now, December 2025 in Fairfax is slightly cooler than the historical average by -1.5 °F.

  • The forecast for the coming days of December 2025 predicts a temperature of 8.4 °F , which is warmer than usual.

  • In general, the average temperature in Fairfax at the beginning of December is 4 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 9.9 °F by the end of December.

    • Rain 🌧️

  • Fairfax experiences moderate rainfall in December, with an average of 6 rainy days and a total precipitation of 177 mm.

    • More

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

Average dry days
23
Dry days
Average rainy days
6
Rainy days
Average snowy days
2
Snow days
Average temperatures
6°/1°
Temperatures
Average wind speed
16 km/h
Avg max wind
Average humidity
73 %
Avg humidity

Fairfax Weather December

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

Temperatures trend during December in Fairfax

See the weather trend as well as the moving average line

December weather in Fairfax day by day

Click on a date for more information
November January
Date Weather Temperatures Rain Snow More
Dec. 1 Overcast
Overcast
 4° /-1° 0 mm 0 cm
Dec. 2 Sunny
Sunny
 3° /-1° 38.2 mm 0 cm
Dec. 3 Sunny
Sunny
 6° /-2° 0 mm 0 cm
Dec. 4 Cloudy
Cloudy
 5° /-2° 0 mm 0 cm
Dec. 5 Overcast
Overcast
 2° /-4° 6.1 mm 4.4 cm
Dec. 6 Partly cloudy
Partly cloudy
 4° /-2° 0 mm 0 cm
Dec. 7 Overcast
Overcast
 4° /-1° 0 mm 0 cm
Dec. 8 Overcast
Overcast
 7° /-1° 0 mm 0 cm
Dec. 9 Moderate or heavy rain shower
Moderate or heavy rain shower
 5° /-1° 10.8 mm 0 cm
Dec. 10 Fog
Fog
 9° /3° 0 mm 0 cm
Dec. 11 Moderate or heavy sleet
Moderate or heavy sleet
 7° /1° 50.8 mm 1 cm
Dec. 12 Sunny
Sunny
 3° /-1° 0 mm 0 cm
Dec. 13 Overcast
Overcast
 4° /-1° 0 mm 0 cm
Dec. 14 Overcast
Overcast
 1° /-3° 7.8 mm 5 cm
Dec. 15 Overcast
Overcast
 2° /-3° 0 mm 0 cm
Dec. 16 Light rain
Light rain
 7° /3° 6.3 mm 0 cm
Dec. 17 Overcast
Overcast
 8° /-3° 0 mm 0 cm
Dec. 18 Patchy rain possible
Patchy rain possible
 9° /0° 1.5 mm 0 cm
Dec. 19 Heavy rain
Heavy rain
 14° /2° 93.8 mm 0 cm
Dec. 20 Sunny
Sunny
 6° /-1° 0 mm 0 cm
Dec. 21 Sunny
Sunny
 10° /3° 0 mm 0 cm
Dec. 22 Sunny
Sunny
 2° /-3° 0 mm 0 cm
Dec. 23 Cloudy
Cloudy
 4° /-3° 0 mm 0 cm
Dec. 24 Overcast
Overcast
 6° /2° 0 mm 0 cm
Dec. 25 Patchy rain possible
Patchy rain possible
 7° /2° 0.5 mm 0 cm
Dec. 26 Patchy rain possible
Patchy rain possible
 18° /6° 0.9 mm 0 cm
Dec. 27 Patchy rain possible
Patchy rain possible
 12° /9° 0.2 mm 0 cm
Dec. 28 Patchy rain possible
Patchy rain possible
 10° /7° 0.1 mm 0 cm
Dec. 29 Sunny
Sunny
 4° /1° 0 mm 0 cm
Dec. 30 Partly cloudy
Partly cloudy
 7° /0° 0 mm 0 cm
Dec. 31 Fog
Fog
 11° /4° 0 mm 0 cm
Next
Important Notice
Our weather forecast for Fairfax 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 Fairfax forecast closer to your planned date for the most up-to-date weather information.
Change Month
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Fairfax in December - FAQ

What are the expected maximum and minimum temperatures in Fairfax during December?
Prepare for cooler days with highs just around 6° and colder nights, dipping below 1°.
How much rainfall should be expected in Fairfax during December?
Significant rainfall exceeding 177 mm is expected in Fairfax during December, occurring over more than 6 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Fairfax in December 2025?
Fairfax experiences an average snowfall of 3.22 cm during December, occurring over 2 days.
What are the typical wind conditions in Fairfax during December?
The average wind speed in Fairfax during December is 16 km/h, suggesting breezy to windy conditions, depending on your activities.

Fairfax snow forecast December 2025

Track daily snowfall levels and discover Fairfax’s snowy potential this December ❄️
On average, Fairfax sees 2 snowy days during December, with approximately 3.2 cm of total snowfall.

December rainfall patterns in Fairfax

Explore the daily rainfall trends and prepare for Fairfaxs December weather 💧
Typically, Fairfax has 6 rainy days in December with a total of 177 mm of rainfall.

Quick links

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Location coordinates Where is Fairfax?

Get accurate weather forecasts for Fairfax, located at latitude 38.846 and longitude -77.306. Stay updated with localized weather information tailored for Fairfax.

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