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

59°F

15°C

Humidity 64%
Wind Speed N 17 G 25 mph
Barometer 29.82 in (1009.7 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 20 Mar 11:52 pm EDT
Extended Forecast for

Vienna VA

  • Overnight

    Overnight: Showers and possibly a thunderstorm before 2am, then isolated showers between 2am and 3am. Low around 49. Southwest wind around 7 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 49 °F

    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 66. North wind 6 to 10 mph, with gusts as high as 18 mph.

    High: 66 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 46. East wind around 6 mph becoming south after midnight.

    Low: 46 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 79. Southwest wind 7 to 11 mph, with gusts as high as 22 mph.

    High: 79 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Scattered showers, with thunderstorms also possible after 11pm. Mostly cloudy, with a low around 53. Southwest wind 7 to 10 mph. Chance of precipitation is 50%.

    Low: 53 °F

    Scattered
    Showers

  • Monday

    Monday: Scattered showers before 2pm. Partly sunny, with a high near 61. Chance of precipitation is 30%.

    High: 61 °F

    Scattered
    Showers

  • Monday Night

    Monday Night: Mostly clear, with a low around 35.

    Low: 35 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 52.

    High: 52 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Showers and possibly a thunderstorm before 2am, then isolated showers between 2am and 3am. Low around 49. Southwest wind around 7 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
Mostly sunny, with a high near 66. North wind 6 to 10 mph, with gusts as high as 18 mph.
Saturday Night
Partly cloudy, with a low around 46. East wind around 6 mph becoming south after midnight.
Sunday
Partly sunny, with a high near 79. Southwest wind 7 to 11 mph, with gusts as high as 22 mph.
Sunday Night
Scattered showers, with thunderstorms also possible after 11pm. Mostly cloudy, with a low around 53. Southwest wind 7 to 10 mph. Chance of precipitation is 50%.
Monday
Scattered showers before 2pm. Partly sunny, with a high near 61. Chance of precipitation is 30%.
Monday Night
Mostly clear, with a low around 35.
Tuesday
Sunny, with a high near 52.
Tuesday Night
Mostly cloudy, with a low around 38.
Wednesday
Mostly cloudy, with a high near 56.
Wednesday Night
Partly cloudy, with a low around 38.
Thursday
Mostly sunny, with a high near 63.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 47. Chance of precipitation is 40%.
Friday
A chance of rain. Partly sunny, with a high near 60. Chance of precipitation is 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:
10:53 pm EDT Mar 20, 2026
Forecast Valid:
12am EDT Mar 21, 2026-6pm EDT Mar 27, 2026
 
Forecast Discussion
 
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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