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

35°F

2°C

Humidity 54%
Wind Speed NW 7 mph
Barometer 30.21 in (1023.2 mb)
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 4 Dec 5:52 pm EST
Extended Forecast for

Reston VA

Winter Weather Advisory December 5, 04:00am until December 5, 04:00pm
Click here for hazard details and duration
Winter Weather Advisory

  • Tonight

    Tonight: Snow likely, mainly after 5am. Increasing clouds, with a low around 22. Northwest wind 5 to 9 mph becoming light and variable after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 60%. Total nighttime 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 4pm, then a slight chance of freezing rain after 4pm. High near 32. 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: 32 °F

    Wintry Mix
    then Slight
    Chance Wintry
    Mix

  • Friday Night

    Friday Night: Patchy fog. Otherwise, mostly cloudy, with a low around 25. Calm wind.

    Low: 25 °F

    Patchy Fog

  • Saturday

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

    High: 43 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 27. Calm wind.

    Low: 27 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 43.

    High: 43 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 35.

    High: 35 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 19.

    Low: 19 °F

    Partly Cloudy

Detailed Forecast

Tonight
Snow likely, mainly after 5am. Increasing clouds, with a low around 22. Northwest wind 5 to 9 mph becoming light and variable after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of less than a half inch possible.
Friday
Snow before 11am, then a chance of snow and freezing rain between 11am and 4pm, then a slight chance of freezing rain after 4pm. High near 32. 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. Otherwise, mostly cloudy, with a low around 25. Calm wind.
Saturday
Mostly sunny, with a high near 43. Light southwest wind.
Saturday Night
Partly cloudy, with a low around 27. Calm wind.
Sunday
Partly sunny, with a high near 43.
Sunday Night
Mostly cloudy, with a low around 27.
Monday
Mostly sunny, with a high near 35.
Monday Night
Partly cloudy, with a low around 19.
Tuesday
Mostly sunny, with a high near 37.
Tuesday Night
Mostly cloudy, with a low around 29.
Wednesday
Mostly cloudy, with a high near 45.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 34. Chance of precipitation is 30%.
Thursday
Partly sunny, with a high near 44.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Reston VA
 38.94°N 77.33°W (Elev. 390 ft)
Last Update:
3:53 pm EST Dec 4, 2025
Forecast Valid:
6pm EST Dec 4, 2025-6pm EST Dec 11, 2025
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation