National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Mostly Cloudy

43°F

6°C

Humidity 49%
Wind Speed NW 12 G 23 mph
Barometer 30.14 in (1020.7 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill37°F (3°C)
Last update 4 Dec 11:52 am EST
Extended Forecast for

3 Miles SSW Herndon VA

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 43. Northwest wind 13 to 18 mph, with gusts as high as 30 mph.

    High: 43 °F

    Mostly Sunny

  • Tonight

    Tonight: Snow likely, mainly after 5am. Increasing clouds, with a low around 22. Northwest wind 5 to 8 mph becoming calm after midnight. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 22 °F

    Partly Cloudy
    then Snow
    Likely

  • Friday

    Friday: Snow before 11am, then a chance of snow and freezing rain between 11am and 3pm, then a slight chance of freezing rain after 3pm. High near 33. Calm wind becoming southeast around 5 mph. Chance of precipitation is 80%. Little or no ice accumulation expected. New snow accumulation of less than a half inch possible.

    High: 33 °F

    Wintry Mix
    then Slight
    Chance Wintry
    Mix

  • Friday Night

    Friday Night: Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 24. Calm wind.

    Low: 24 °F

    Patchy Fog

  • Saturday

    Saturday: Mostly sunny, with a high near 43. Calm wind.

    High: 43 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 26.

    Low: 26 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 44.

    High: 44 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 26.

    Low: 26 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 35.

    High: 35 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 43. Northwest wind 13 to 18 mph, with gusts as high as 30 mph.
Tonight
Snow likely, mainly after 5am. Increasing clouds, with a low around 22. Northwest wind 5 to 8 mph becoming calm after midnight. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday
Snow before 11am, then a chance of snow and freezing rain between 11am and 3pm, then a slight chance of freezing rain after 3pm. High near 33. Calm wind becoming southeast around 5 mph. Chance of precipitation is 80%. Little or no ice accumulation expected. New snow accumulation of less than a half inch possible.
Friday Night
Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 24. Calm wind.
Saturday
Mostly sunny, with a high near 43. Calm wind.
Saturday Night
Partly cloudy, with a low around 26.
Sunday
Partly sunny, with a high near 44.
Sunday Night
Mostly cloudy, with a low around 26.
Monday
Mostly sunny, with a high near 35.
Monday Night
Partly cloudy, with a low around 18.
Tuesday
Mostly sunny, with a high near 38.
Tuesday Night
Mostly cloudy, with a low around 28.
Wednesday
Mostly cloudy, with a high near 45.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Herndon VA
 38.93°N 77.42°W (Elev. 308 ft)
Last Update:
12:14 pm EST Dec 4, 2025
Forecast Valid:
12pm EST Dec 4, 2025-6pm EST Dec 10, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation