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.

Fair

30°F

-1°C

Humidity 96%
Wind Speed Calm
Barometer 30.07 in (1018.4 mb)
Dewpoint 29°F (-2°C)
Visibility 7.00 mi
Last update 7 Dec 10:52 pm EST
Extended Forecast for

Chantilly VA

  • Tonight

    Tonight: Patchy fog between 1am and 2am. Otherwise, cloudy, with a low around 26. Light northwest wind becoming north 5 to 10 mph after midnight.

    Low: 26 °F

    Patchy Fog

  • Monday

    Monday: A chance of snow, mainly between 8am and 4pm. Cloudy, with a high near 31. Northeast wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.

    High: 31 °F

    Chance Snow

  • Monday Night

    Monday Night: Cloudy during the early evening, then gradual clearing, with a low around 17. North wind around 6 mph becoming calm after midnight.

    Low: 17 °F

    Gradual
    Clearing

  • Tuesday

    Tuesday: Mostly sunny, with a high near 36. Light and variable wind becoming south 5 to 10 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 36 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 29. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 29 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of rain after 1pm. Mostly cloudy, with a high near 48. Chance of precipitation is 20%.

    High: 48 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 42.

    High: 42 °F

    Mostly Sunny

  • Thursday Night

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

    Low: 26 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Patchy fog between 1am and 2am. Otherwise, cloudy, with a low around 26. Light northwest wind becoming north 5 to 10 mph after midnight.
Monday
A chance of snow, mainly between 8am and 4pm. Cloudy, with a high near 31. Northeast wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.
Monday Night
Cloudy during the early evening, then gradual clearing, with a low around 17. North wind around 6 mph becoming calm after midnight.
Tuesday
Mostly sunny, with a high near 36. Light and variable wind becoming south 5 to 10 mph in the afternoon. Winds could gust as high as 18 mph.
Tuesday Night
Mostly cloudy, with a low around 29. South wind around 10 mph, with gusts as high as 20 mph.
Wednesday
A slight chance of rain after 1pm. Mostly cloudy, with a high near 48. Chance of precipitation is 20%.
Wednesday Night
Mostly cloudy, with a low around 32.
Thursday
Mostly sunny, with a high near 42.
Thursday Night
Mostly cloudy, with a low around 26.
Friday
Partly sunny, with a high near 40.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 23. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 34.
Saturday Night
Partly cloudy, with a low around 19.
Sunday
Mostly sunny, with a high near 31.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Chantilly VA
 38.88°N 77.4°W (Elev. 358 ft)
Last Update:
10:59 pm EST Dec 7, 2025
Forecast Valid:
11pm EST Dec 7, 2025-6pm EST Dec 14, 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