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

43°F

6°C

Humidity 58%
Wind Speed SW 9 mph
Barometer 30.07 in (1018.6 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 7 Dec 1:52 pm EST
Extended Forecast for

Great Falls VA

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 41. South wind around 6 mph.

    High: 41 °F

    Mostly Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 26. Calm wind becoming north 5 to 9 mph after midnight.

    Low: 26 °F

    Increasing
    Clouds

  • Monday

    Monday: A slight chance of snow between 9am and 10am. Mostly cloudy, with a high near 31. North wind 8 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 31 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 17. North wind around 6 mph becoming calm in the evening.

    Low: 17 °F

    Partly Cloudy

  • Tuesday

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

    High: 36 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 31.

    Low: 31 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 49.

    High: 49 °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 43.

    High: 43 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 41. South wind around 6 mph.
Tonight
Increasing clouds, with a low around 26. Calm wind becoming north 5 to 9 mph after midnight.
Monday
A slight chance of snow between 9am and 10am. Mostly cloudy, with a high near 31. North wind 8 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Monday Night
Partly cloudy, with a low around 17. North wind around 6 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 36. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 18 mph.
Tuesday Night
Mostly cloudy, with a low around 31.
Wednesday
Mostly cloudy, with a high near 49.
Wednesday Night
Mostly cloudy, with a low around 33.
Thursday
Partly sunny, with a high near 43.
Thursday Night
A chance of rain and snow. Mostly cloudy, with a low around 29. Chance of precipitation is 40%.
Friday
A chance of rain and snow. Partly sunny, with a high near 38. Chance of precipitation is 30%.
Friday Night
A chance of snow. Mostly cloudy, with a low around 20. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 33.
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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:
12:53 pm EST Dec 7, 2025
Forecast Valid:
2pm EST Dec 7, 2025-6pm EST Dec 13, 2025
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation