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

30°F

-1°C

Humidity 82%
Wind Speed S 8 mph
Barometer 29.84 in (1010.7 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill22°F (-6°C)
Last update 10 Dec 3:52 am EST
Extended Forecast for

Great Falls VA

  • Today

    Today: A chance of rain, mainly between 10am and 4pm. Cloudy, with a high near 44. South wind 10 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.

    High: 44 °F

    Chance Rain

  • Tonight

    Tonight: Partly cloudy, with a low around 29. Southwest wind 10 to 13 mph becoming northwest after midnight. Winds could gust as high as 21 mph.

    Low: 29 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 36. West wind 13 to 16 mph, with gusts as high as 28 mph.

    High: 36 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 24. West wind 6 to 9 mph, with gusts as high as 18 mph.

    Low: 24 °F

    Increasing
    Clouds

  • Friday

    Friday: A chance of snow. Mostly cloudy, with a high near 36. Southwest wind 3 to 6 mph. Chance of precipitation is 40%.

    High: 36 °F

    Chance Snow

  • Friday Night

    Friday Night: A chance of snow, mainly before 1am. Mostly cloudy, with a low around 26. Chance of precipitation is 30%.

    Low: 26 °F

    Chance Snow

  • Saturday

    Saturday: Partly sunny, with a high near 41.

    High: 41 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A chance of snow after 1am. Mostly cloudy, with a low around 25. Chance of precipitation is 40%.

    Low: 25 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday

    Sunday: Mostly sunny, with a high near 33.

    High: 33 °F

    Mostly Sunny

Detailed Forecast

Today
A chance of rain, mainly between 10am and 4pm. Cloudy, with a high near 44. South wind 10 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Tonight
Partly cloudy, with a low around 29. Southwest wind 10 to 13 mph becoming northwest after midnight. Winds could gust as high as 21 mph.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 36. West wind 13 to 16 mph, with gusts as high as 28 mph.
Thursday Night
Increasing clouds, with a low around 24. West wind 6 to 9 mph, with gusts as high as 18 mph.
Friday
A chance of snow. Mostly cloudy, with a high near 36. Southwest wind 3 to 6 mph. Chance of precipitation is 40%.
Friday Night
A chance of snow, mainly before 1am. Mostly cloudy, with a low around 26. Chance of precipitation is 30%.
Saturday
Partly sunny, with a high near 41.
Saturday Night
A chance of snow after 1am. Mostly cloudy, with a low around 25. Chance of precipitation is 40%.
Sunday
Mostly sunny, with a high near 33.
Sunday Night
Mostly clear, with a low around 16.
Monday
Sunny, with a high near 31.
Monday Night
Partly cloudy, with a low around 19.
Tuesday
Mostly sunny, with a high near 37.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Great Falls VA
 39.01°N 77.29°W (Elev. 348 ft)
Last Update:
3:53 am EST Dec 10, 2025
Forecast Valid:
4am EST Dec 10, 2025-6pm EST Dec 16, 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