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

79°F

26°C

Humidity 79%
Wind Speed Vrbl 5 mph
Barometer 30.11 in (1019.2 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 12 Aug 10:52 am EDT
Extended Forecast for

3 Miles SE Great Falls VA

  • Today

    Today: A chance of showers and thunderstorms, mainly between 4pm and 5pm. Mostly sunny, with a high near 90. South wind around 6 mph. Chance of precipitation is 30%.

    High: 90 °F

    Chance
    T-storms

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 73. South wind around 6 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 73 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 90. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 90 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 72. Light southwest wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 72 °F

    Showers
    Likely then
    Chance
    Showers

  • Thursday

    Thursday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 90. Northwest wind 3 to 6 mph. Chance of precipitation is 40%.

    High: 90 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Partly cloudy, with a low around 71. Chance of precipitation is 30%.

    Low: 71 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 90.

    High: 90 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

  • Saturday

    Saturday: A chance of showers after 2pm. Mostly sunny, with a high near 91. Chance of precipitation is 30%.

    High: 91 °F

    Sunny then
    Chance
    Showers

Detailed Forecast

Today
A chance of showers and thunderstorms, mainly between 4pm and 5pm. Mostly sunny, with a high near 90. South wind around 6 mph. Chance of precipitation is 30%.
Tonight
A slight chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 73. South wind around 6 mph becoming calm in the evening. Chance of precipitation is 20%.
Wednesday
A slight chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 90. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 72. Light southwest wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 90. Northwest wind 3 to 6 mph. Chance of precipitation is 40%.
Thursday Night
A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Partly cloudy, with a low around 71. Chance of precipitation is 30%.
Friday
Mostly sunny, with a high near 90.
Friday Night
Mostly clear, with a low around 70.
Saturday
A chance of showers after 2pm. Mostly sunny, with a high near 91. Chance of precipitation is 30%.
Saturday Night
A chance of showers before 8pm. Mostly clear, with a low around 71. Chance of precipitation is 30%.
Sunday
Sunny, with a high near 95.
Sunday Night
Mostly clear, with a low around 72.
Monday
Mostly sunny, with a high near 91.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE Great Falls VA
 38.98°N 77.27°W (Elev. 266 ft)
Last Update:
10:30 am EDT Aug 12, 2025
Forecast Valid:
11am EDT Aug 12, 2025-6pm EDT Aug 18, 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