Herndon (VA)
December
Weather in Herndon, Virginia for December 2026
Your guide to Herndon weather in December - trends and predictions
With an average of 3 snowy days, Herndon usually enjoys a light touch of snow in December.
In general, the average temperature in Herndon at the beginning of December is 4.1 °F. As the month progressed, temperatures tended to remain steady, reaching an average of 4.1 °F by the end of December.
With an average of 4 rainy days, Herndon experiences minimal rainfall in December.
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Snow Forecast ❄️
Temperatures
Rain 🌧️
More
24
Dry days
4
Rainy days
3
Snow days
4°/-2°
Temperatures
19 km/h
Avg max wind
70 %
Avg humidity
Herndon Weather December
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Temperatures trend during December in Herndon
See the weather trend as well as the moving average line
December weather in Herndon day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| Dec. 1 |  Partly cloudy | 4° /-1° | 0 mm | 0 cm | |
| Dec. 2 |  Moderate or heavy rain shower | 3° /1° | 72.3 mm | 0 cm | |
| Dec. 3 |  Sunny | 6° /-2° | 0 mm | 0 cm | |
| Dec. 4 |  Cloudy | 5° /-1° | 0 mm | 0 cm | |
| Dec. 5 |  Moderate or heavy snow showers | 0° /-6° | 10.6 mm | 7.7 cm | |
| Dec. 6 |  Overcast | 6° /0° | 0 mm | 0 cm | |
| Dec. 7 | Overcast | 5° /1° | 0 mm | 0 cm | |
| Dec. 8 | Cloudy | 0° /-3° | 0 mm | 0 cm | |
| Dec. 9 | Cloudy | 0° /-7° | 0 mm | 0 cm | |
| Dec. 10 | Overcast | 5° /-1° | 0 mm | 0 cm | |
| Dec. 11 | Partly cloudy | 2° /-2° | 0 mm | 0 cm | |
| Dec. 12 | Overcast | 1° /-2° | 0 mm | 0 cm | |
| Dec. 13 |  Mist | 5° /-1° | 0 mm | 0 cm | |
| Dec. 14 |  Heavy snow | 1° /-5° | 14.9 mm | 10 cm | |
| Dec. 15 | Partly cloudy | 0° /-7° | 0 mm | 0 cm | |
| Dec. 16 | Cloudy | 5° /-3° | 0 mm | 0 cm | |
| Dec. 17 | Overcast | 5° /-1° | 0 mm | 0 cm | |
| Dec. 18 |  Freezing fog | 8° /-1° | 1.6 mm | 0 cm | |
| Dec. 19 |  Heavy rain | 12° /-1° | 37.5 mm | 0 cm | |
| Dec. 20 | Overcast | 3° /-4° | 0 mm | 0 cm | |
| Dec. 21 | Overcast | 8° /0° | 0 mm | 0 cm | |
| Dec. 22 | Sunny | 4° /-4° | 0 mm | 0 cm | |
| Dec. 23 |  Light rain | 8° /1° | 11.3 mm | 0 cm | |
| Dec. 24 | Overcast | 7° /3° | 0 mm | 0 cm | |
| Dec. 25 | Moderate or heavy snow showers | 5° /0° | 20.7 mm | 2.5 cm | |
| Dec. 26 | Overcast | 1° /-2° | 0 mm | 0 cm | |
| Dec. 27 | Overcast | 3° /0° | 0 mm | 0 cm | |
| Dec. 28 | Mist | 2° /-2° | 0 mm | 0 cm | |
| Dec. 29 | Overcast | 13° /0° | 0 mm | 0 cm | |
| Dec. 30 | Sunny | 2° /-3° | 0 mm | 0 cm | |
| Dec. 31 | Overcast | 3° /-4° | 0 mm | 0 cm | |
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Important Notice
Our weather forecast for Herndon 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 Herndon forecast closer to your planned date for the most up-to-date weather information.
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Herndon in December - FAQ
What are the expected maximum and minimum temperatures in Herndon during December?
Brace for cold days with temperatures not exceeding 4° and nights that are likely to be freezing. Winter clothing is essential for comfort and safety.
How much rainfall should be expected in Herndon during December?
Significant rainfall exceeding 168.9 mm is expected in Herndon during December, occurring over more than 4 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Herndon in December 2026?
Herndon experiences an average snowfall of 20.2 cm during December, occurring over 3 days.
What are the typical wind conditions in Herndon during December?
The average wind speed in Herndon during December is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
Herndon snow forecast December 2026
Track daily snowfall levels and discover Herndon’s snowy potential this December ❄️
On average, Herndon sees 3 snowy days during December, with approximately 20.2 cm of total snowfall.
December rainfall patterns in Herndon
Explore the daily rainfall trends and prepare for Herndons December weather 💧
Typically, Herndon has 4 rainy days in December with a total of 168.9 mm of rainfall.
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