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

54°F

12°C

Humidity 51%
Wind Speed SE 9 mph
Barometer 30.12 in (1019.9 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill51°F (11°C)
Last update 25 Mar 9:52 pm EDT
Extended Forecast for

Great Falls VA

  • Tonight

    Tonight: Mostly cloudy, with a low around 49. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 49 °F

    Mostly Cloudy

  • Thursday

    Thursday: A slight chance of rain before 1pm. Mostly sunny, with a high near 75. Southwest wind 9 to 11 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.

    High: 75 °F

    Slight Chance
    Rain

  • Thursday Night

    Thursday Night: A slight chance of rain before 7pm, then a chance of rain after 2am. Increasing clouds, with a low around 56. Southwest wind around 11 mph, with gusts as high as 23 mph. Chance of precipitation is 50%.

    Low: 56 °F

    Partly Cloudy
    then Chance
    Rain

  • Friday

    Friday: Rain, mainly after 8am. High near 63. West wind around 10 mph becoming north in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 63 °F

    Rain

  • Friday Night

    Friday Night: A slight chance of rain before 2am. Mostly cloudy, with a low around 33. North wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 33 °F

    Slight Chance
    Rain

  • Saturday

    Saturday: Sunny, with a high near 48.

    High: 48 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 31.

    Low: 31 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 41.

    Low: 41 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 49. South wind around 10 mph, with gusts as high as 20 mph.
Thursday
A slight chance of rain before 1pm. Mostly sunny, with a high near 75. Southwest wind 9 to 11 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
Thursday Night
A slight chance of rain before 7pm, then a chance of rain after 2am. Increasing clouds, with a low around 56. Southwest wind around 11 mph, with gusts as high as 23 mph. Chance of precipitation is 50%.
Friday
Rain, mainly after 8am. High near 63. West wind around 10 mph becoming north in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
A slight chance of rain before 2am. Mostly cloudy, with a low around 33. North wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Saturday
Sunny, with a high near 48.
Saturday Night
Mostly clear, with a low around 31.
Sunday
Sunny, with a high near 56.
Sunday Night
Partly cloudy, with a low around 41.
Monday
Partly sunny, with a high near 63.
Monday Night
Mostly cloudy, with a low around 50.
Tuesday
A chance of rain. Partly sunny, with a high near 68. Chance of precipitation is 30%.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 53. Chance of precipitation is 30%.
Wednesday
A chance of rain. Partly sunny, with a high near 76. Chance of precipitation is 30%.
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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:
7:55 pm EDT Mar 25, 2026
Forecast Valid:
10pm EDT Mar 25, 2026-6pm EDT Apr 1, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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