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

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

A Few Clouds

28°F

-2°C

Humidity 72%
Wind Speed Calm
Barometer 30.28 in (1025.7 mb)
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Last update 1 Dec 7:52 pm EST
Extended Forecast for

Vienna VA

  • Tonight

    Tonight: A slight chance of snow and sleet before 4am, then a chance of sleet between 4am and 5am, then rain likely, possibly mixed with sleet after 5am. Mostly cloudy, with a low around 31. Southeast wind 3 to 5 mph. Chance of precipitation is 60%. Little or no snow and sleet accumulation expected.

    Low: 31 °F

    Mostly Cloudy
    then Wintry
    Mix Likely

  • Tuesday

    Tuesday: Rain, possibly mixed with snow and sleet before 2pm, then a chance of rain between 2pm and 4pm. High near 39. Light and variable wind becoming northwest 5 to 10 mph in the morning. Chance of precipitation is 100%. Little or no snow and sleet accumulation expected.

    High: 39 °F

    Wintry Mix
    then Rain

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 28. Northwest wind 10 to 13 mph, with gusts as high as 18 mph.

    Low: 28 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 40. Northwest wind 5 to 8 mph becoming light and variable in the afternoon.

    High: 40 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 27. Light south wind.

    Low: 27 °F

    Mostly Clear

  • Thursday

    Thursday: Partly sunny, with a high near 43.

    High: 43 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 20.

    Low: 20 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 34.

    High: 34 °F

    Partly Sunny

  • Friday Night

    Friday Night: A chance of snow. Mostly cloudy, with a low around 27. Chance of precipitation is 40%.

    Low: 27 °F

    Chance Snow

Detailed Forecast

Tonight
A slight chance of snow and sleet before 4am, then a chance of sleet between 4am and 5am, then rain likely, possibly mixed with sleet after 5am. Mostly cloudy, with a low around 31. Southeast wind 3 to 5 mph. Chance of precipitation is 60%. Little or no snow and sleet accumulation expected.
Tuesday
Rain, possibly mixed with snow and sleet before 2pm, then a chance of rain between 2pm and 4pm. High near 39. Light and variable wind becoming northwest 5 to 10 mph in the morning. Chance of precipitation is 100%. Little or no snow and sleet accumulation expected.
Tuesday Night
Mostly clear, with a low around 28. Northwest wind 10 to 13 mph, with gusts as high as 18 mph.
Wednesday
Sunny, with a high near 40. Northwest wind 5 to 8 mph becoming light and variable in the afternoon.
Wednesday Night
Mostly clear, with a low around 27. Light south wind.
Thursday
Partly sunny, with a high near 43.
Thursday Night
Partly cloudy, with a low around 20.
Friday
Partly sunny, with a high near 34.
Friday Night
A chance of snow. Mostly cloudy, with a low around 27. Chance of precipitation is 40%.
Saturday
Partly sunny, with a high near 43.
Saturday Night
Mostly cloudy, with a low around 29.
Sunday
Partly sunny, with a high near 42.
Sunday Night
Mostly cloudy, with a low around 25.
Monday
Mostly sunny, with a high near 36.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Vienna VA
 38.89°N 77.25°W (Elev. 348 ft)
Last Update:
6:53 pm EST Dec 1, 2025
Forecast Valid:
8pm EST Dec 1, 2025-6pm EST Dec 8, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation