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Fairfax County (Herndon)
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United States weather

Weather in Fairfax County, Virginia for January 2027

Your guide to Fairfax County weather in January - trends and predictions

    Snow Forecast ❄️

  • With an average of 3 snowy days, Fairfax County usually enjoys a light touch of snow in January.

    • Temperatures

  • In general, the average temperature in Fairfax County at the beginning of January is 4.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of -4.4 °C by the end of January.

    • Rain 🌧️

  • With an average of 3 rainy days, Fairfax County experiences minimal rainfall in January.

    • More

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

Average dry days
25
Dry days
Average rainy days
3
Rainy days
Average snowy days
3
Snow days
Average temperatures
2°/-4°
Temperatures
Average wind speed
19 km/h
Avg max wind
Average humidity
63 %
Avg humidity

Fairfax County Weather January

Move between months or click on a day
December
February
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Partly cloudy
0°
2
Overcast
2°
3
Overcast
3°
4
Cloudy
5°
5
Overcast
3°
6
Mist
4°
7
Sunny
12°
8
Fog
8°
9
Mist
8°
10
Moderate or heavy rain shower
10°
11
Cloudy
6°
12
Partly cloudy
6°
13
Partly cloudy
8°
14
Moderate rain at times
6°
15
Partly cloudy
3°
16
Cloudy
1°
17
Overcast
5°
18
Moderate snow
3°
19
Sunny
6°
20
Partly cloudy
0°
21
Sunny
3°
22
Sunny
8°
23
Overcast
4°
24
Overcast
-8°
25
Ice pellets
-3°
26
Freezing fog
-2°
27
Sunny
-2°
28
Overcast
-6°
29
Partly cloudy
-5°
30
Overcast
-7°
31
Cloudy
-6°

Temperatures trend during January in Fairfax County

See the weather trend as well as the moving average line

January weather in Fairfax County day by day

Click on a date for more information
December February
Date Weather Temperatures Rain Snow More
Jan. 1 Partly cloudy
Partly cloudy
 0° /-3° 0 mm 0 cm
Jan. 2 Overcast
Overcast
 2° /-4° 0 mm 0 cm
Jan. 3 Overcast
Overcast
 3° /-3° 0 mm 0 cm
Jan. 4 Cloudy
Cloudy
 5° /-1° 0 mm 0 cm
Jan. 5 Overcast
Overcast
 3° /-3° 0 mm 0 cm
Jan. 6 Mist
Mist
 4° /1° 0 mm 0 cm
Jan. 7 Sunny
Sunny
 12° /5° 0 mm 0 cm
Jan. 8 Fog
Fog
 8° /-1° 0 mm 0 cm
Jan. 9 Mist
Mist
 8° /2° 0 mm 0 cm
Jan. 10 Moderate or heavy rain shower
Moderate or heavy rain shower
 10° /5° 69.5 mm 0 cm
Jan. 11 Cloudy
Cloudy
 6° /0° 0 mm 0 cm
Jan. 12 Partly cloudy
Partly cloudy
 6° /-1° 0 mm 0 cm
Jan. 13 Partly cloudy
Partly cloudy
 8° /0° 0 mm 0 cm
Jan. 14 Moderate rain at times
Moderate rain at times
 6° /3° 4.6 mm 0 cm
Jan. 15 Partly cloudy
Partly cloudy
 3° /-4° 2.7 mm 0 cm
Jan. 16 Cloudy
Cloudy
 1° /-5° 0 mm 0 cm
Jan. 17 Overcast
Overcast
 5° /0° 0 mm 0 cm
Jan. 18 Moderate snow
Moderate snow
 3° /-2° 3 mm 2 cm
Jan. 19 Sunny
Sunny
 6° /-7° 0 mm 0 cm
Jan. 20 Partly cloudy
Partly cloudy
 0° /-9° 0 mm 0 cm
Jan. 21 Sunny
Sunny
 3° /-8° 0 mm 0 cm
Jan. 22 Sunny
Sunny
 8° /0° 0 mm 0 cm
Jan. 23 Overcast
Overcast
 4° /-4° 0 mm 0 cm
Jan. 24 Overcast
Overcast
 -8° /-12° 0 mm 0 cm
Jan. 25 Ice pellets
Ice pellets
 -3° /-9° 129.7 mm 93.7 cm
Jan. 26 Freezing fog
Freezing fog
 -2° /-8° 9.4 mm 6.8 cm
Jan. 27 Sunny
Sunny
 -2° /-12° 0 mm 0 cm
Jan. 28 Overcast
Overcast
 -6° /-12° 0 mm 0 cm
Jan. 29 Partly cloudy
Partly cloudy
 -5° /-12° 0 mm 0 cm
Jan. 30 Overcast
Overcast
 -7° /-14° 0 mm 0 cm
Jan. 31 Cloudy
Cloudy
 -6° /-13° 0 mm 0 cm
Next
Important Notice
Our weather forecast for Fairfax County in January 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 County forecast closer to your planned date for the most up-to-date weather information.
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Fairfax County in January - FAQ

What are the expected maximum and minimum temperatures in Fairfax County during January?

Brace for cold days with temperatures not exceeding 2° and nights that are likely to be freezing. Winter clothing is essential for comfort and safety.

How much rainfall should be expected in Fairfax County during January?

Significant rainfall exceeding 218.9 mm is expected in Fairfax County during January, occurring over more than 3 days. Preparing for wet conditions is recommended in your planning.

Will it snow in Fairfax County in January 2027?

Fairfax County experiences an average snowfall of 102.5 cm during January, occurring over 3 days.

What are the typical wind conditions in Fairfax County during January?

The average wind speed in Fairfax County during January is 19 km/h, suggesting breezy to windy conditions, depending on your activities.

Fairfax County snow forecast January 2027

Track daily snowfall levels and discover Fairfax County’s snowy potential this January ❄️
On average, Fairfax County sees 3 snowy days during January, with approximately 102.5 cm of total snowfall.

January rainfall patterns in Fairfax County

Explore the daily rainfall trends and prepare for Fairfax Countys January weather 💧
Typically, Fairfax County has 3 rainy days in January with a total of 218.9 mm of rainfall.
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Herndon
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Location coordinates Where is Fairfax County?

Get accurate weather forecasts for Fairfax County, located at latitude 38.97 and longitude -77.386. Stay updated with localized weather information tailored for Fairfax County.

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