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.

Partly Cloudy

62°F

17°C

Humidity 54%
Wind Speed N 13 mph
Barometer 29.98 in (1015.0 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 9 May 6:52 pm EDT
Extended Forecast for

Great Falls VA

  • Tonight

    Tonight: Isolated showers before 8pm. Mostly cloudy, then gradually becoming clear, with a low around 46. West wind 6 to 10 mph. Chance of precipitation is 20%.

    Low: 46 °F

    Isolated
    Showers then
    Clear

  • Saturday

    Saturday: Sunny, with a high near 71. Northwest wind 8 to 13 mph, with gusts as high as 22 mph.

    High: 71 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 52. West wind around 5 mph becoming calm in the evening.

    Low: 52 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 76. North wind around 7 mph.

    High: 76 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 54. Northeast wind around 5 mph becoming calm in the evening.

    Low: 54 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 76.

    High: 76 °F

    Partly Sunny

  • Monday Night

    Monday Night: A chance of showers. Mostly cloudy, with a low around 62. Chance of precipitation is 50%.

    Low: 62 °F

    Chance
    Showers

  • Tuesday

    Tuesday: Showers likely. Mostly cloudy, with a high near 70. Chance of precipitation is 70%.

    High: 70 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm before 2am, then showers likely. Low around 64. Chance of precipitation is 80%.

    Low: 64 °F

    Showers

Detailed Forecast

Tonight
Isolated showers before 8pm. Mostly cloudy, then gradually becoming clear, with a low around 46. West wind 6 to 10 mph. Chance of precipitation is 20%.
Saturday
Sunny, with a high near 71. Northwest wind 8 to 13 mph, with gusts as high as 22 mph.
Saturday Night
Partly cloudy, with a low around 52. West wind around 5 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 76. North wind around 7 mph.
Sunday Night
Mostly cloudy, with a low around 54. Northeast wind around 5 mph becoming calm in the evening.
Monday
Partly sunny, with a high near 76.
Monday Night
A chance of showers. Mostly cloudy, with a low around 62. Chance of precipitation is 50%.
Tuesday
Showers likely. Mostly cloudy, with a high near 70. Chance of precipitation is 70%.
Tuesday Night
Showers and possibly a thunderstorm before 2am, then showers likely. Low around 64. Chance of precipitation is 80%.
Wednesday
Showers. High near 76. Chance of precipitation is 80%.
Wednesday Night
Showers. Low around 64. Chance of precipitation is 80%.
Thursday
A chance of showers. Partly sunny, with a high near 82. Chance of precipitation is 50%.
Thursday Night
A chance of showers. Partly cloudy, with a low around 66. Chance of precipitation is 30%.
Friday
A chance of showers. Mostly sunny, with a high near 87. Chance of precipitation is 40%.
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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:
4:29 pm EDT May 9, 2025
Forecast Valid:
6pm EDT May 9, 2025-6pm EDT May 16, 2025
 
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