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.

Overcast

38°F

3°C

Humidity 70%
Wind Speed Calm
Barometer 30.21 in (1023.4 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Last update 27 Dec 9:52 pm EST
Extended Forecast for

Vienna VA

  • Tonight

    Tonight: Mostly cloudy, with a low around 29. Calm wind.

    Low: 29 °F

    Mostly Cloudy

  • Sunday

    Sunday: A slight chance of rain between 1pm and 4pm. Mostly cloudy, with a high near 48. Light southeast wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 20%.

    High: 48 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Sunday Night

    Sunday Night: A slight chance of rain after 1am. Patchy fog before 1am, then patchy fog after 2am. Otherwise, cloudy, with a temperature falling to near 42 by 8pm, then rising to around 51 during the remainder of the night. South wind 10 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.

    Low: 42 °F⇑

    Patchy Fog
    then Slight
    Chance Rain
    and Patchy
    Fog

  • Monday

    Monday: A chance of rain, mainly before 1pm. Patchy fog before 8am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 58. Southwest wind 15 to 18 mph becoming west in the afternoon. Winds could gust as high as 34 mph. Chance of precipitation is 40%.

    High: 58 °F

    Chance Rain
    and Patchy
    Fog

  • Monday Night

    Monday Night: Partly cloudy, with a low around 26. West wind around 17 mph, with gusts as high as 33 mph.

    Low: 26 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 36. Breezy.

    High: 36 °F

    Mostly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 25.

    Low: 25 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 42.

    High: 42 °F

    Mostly Sunny

  • Wednesday Night

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

    Low: 27 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 29. Calm wind.
Sunday
A slight chance of rain between 1pm and 4pm. Mostly cloudy, with a high near 48. Light southeast wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 20%.
Sunday Night
A slight chance of rain after 1am. Patchy fog before 1am, then patchy fog after 2am. Otherwise, cloudy, with a temperature falling to near 42 by 8pm, then rising to around 51 during the remainder of the night. South wind 10 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.
Monday
A chance of rain, mainly before 1pm. Patchy fog before 8am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 58. Southwest wind 15 to 18 mph becoming west in the afternoon. Winds could gust as high as 34 mph. Chance of precipitation is 40%.
Monday Night
Partly cloudy, with a low around 26. West wind around 17 mph, with gusts as high as 33 mph.
Tuesday
Mostly sunny, with a high near 36. Breezy.
Tuesday Night
Mostly clear, with a low around 25.
Wednesday
Mostly sunny, with a high near 42.
Wednesday Night
Mostly cloudy, with a low around 27.
New Year's Day
Mostly cloudy, with a high near 41.
Thursday Night
Partly cloudy, with a low around 22.
Friday
Sunny, with a high near 36.
Friday Night
Mostly clear, with a low around 22.
Saturday
Mostly sunny, with a high near 40.
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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:
9:53 pm EST Dec 27, 2025
Forecast Valid:
10pm EST Dec 27, 2025-6pm EST Jan 3, 2026
 
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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