National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Air Quality Concerns; Fire Weather; Extreme Heat; Flash Flooding

Wildfire smoke continues to result in poor air quality from the Upper Midwest into the Northeast. Dangerous heat and fire weather concerns for portions of the Four Corners region into the central Great Basin. Heavy rainfall and flash flooding possible for the Southeast through Monday. For Hawaii, gusty trade winds a drier weather could result in any fires that start to spread rapidly. Read More >

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Fair

61°F

16°C

Humidity 90%
Wind Speed NW 3 mph
Barometer 30.16 in (1020.9 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 4 Aug 5:52 am EDT
Extended Forecast for

Great Falls VA

  • Today

    Today: Sunny, with a high near 85. Light and variable wind.

    High: 85 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 64. Light and variable wind.

    Low: 64 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 84. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 84 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 68. Light southeast wind.

    Low: 68 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of showers after 2pm. Mostly cloudy, with a high near 81. East wind 3 to 6 mph. Chance of precipitation is 30%.

    High: 81 °F

    Mostly Cloudy
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers, mainly before 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 30%.

    Low: 67 °F

    Chance
    Showers

  • Thursday

    Thursday: Partly sunny, with a high near 82.

    High: 82 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 85. Light and variable wind.
Tonight
Increasing clouds, with a low around 64. Light and variable wind.
Tuesday
Mostly cloudy, with a high near 84. Calm wind becoming southeast around 5 mph in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 68. Light southeast wind.
Wednesday
A chance of showers after 2pm. Mostly cloudy, with a high near 81. East wind 3 to 6 mph. Chance of precipitation is 30%.
Wednesday Night
A chance of showers, mainly before 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 30%.
Thursday
Partly sunny, with a high near 82.
Thursday Night
Partly cloudy, with a low around 64.
Friday
Mostly sunny, with a high near 82.
Friday Night
Partly cloudy, with a low around 65.
Saturday
Mostly sunny, with a high near 84.
Saturday Night
Partly cloudy, with a low around 68.
Sunday
Mostly sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Great Falls VA
 39.01°N 77.29°W (Elev. 348 ft)
Last Update:
4:29 am EDT Aug 4, 2025
Forecast Valid:
5am EDT Aug 4, 2025-6pm EDT Aug 10, 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