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.

Mostly Cloudy

28°F

-2°C

Humidity 96%
Wind Speed Calm
Barometer 30.06 in (1018.3 mb)
Dewpoint 27°F (-3°C)
Visibility 7.00 mi
Last update 7 Dec 9:52 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

    Cloudy then
    Patchy Fog

  • Monday

    Monday: A slight chance of snow between 8am and 2pm. Mostly cloudy, with a high near 32. North wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.

    High: 32 °F

    Slight Chance
    Snow

  • Monday Night

    Monday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 18. North wind around 6 mph becoming calm in the evening.

    Low: 18 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 37. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 37 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 31. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 31 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 50.

    High: 50 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 33.

    Low: 33 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 44.

    High: 44 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A chance of rain and snow. Mostly cloudy, with a low around 29. Chance of precipitation is 40%.

    Low: 29 °F

    Chance
    Rain/Snow

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 slight chance of snow between 8am and 2pm. Mostly cloudy, with a high near 32. North wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Monday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 18. North wind around 6 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 37. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Tuesday Night
Mostly cloudy, with a low around 31. South wind around 10 mph, with gusts as high as 20 mph.
Wednesday
Mostly cloudy, with a high near 50.
Wednesday Night
Mostly cloudy, with a low around 33.
Thursday
Partly sunny, with a high near 44.
Thursday Night
A chance of rain and snow. Mostly cloudy, with a low around 29. Chance of precipitation is 40%.
Friday
A chance of snow before 1pm. Partly sunny, with a high near 39. Chance of precipitation is 30%.
Friday Night
Mostly cloudy, with a low around 21.
Saturday
Mostly sunny, with a high near 33.
Saturday Night
Partly cloudy, with a low around 20.
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:
9:53 pm EST Dec 7, 2025
Forecast Valid:
10pm EST Dec 7, 2025-6pm EST Dec 14, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation