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.

A Few Clouds

73°F

23°C

Humidity 96%
Wind Speed Calm
Barometer 29.87 in (1011.1 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 18 Aug 12:52 am EDT
Extended Forecast for

2 Miles SW Great Falls VA

  • Overnight

    Overnight: Mostly cloudy early, then becoming mostly clear, with a low around 71. Light northwest wind.

    Low: 71 °F

    Mostly Clear

  • Tuesday

    Tuesday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 86. North wind 5 to 7 mph.

    High: 86 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 67. Light northwest wind.

    Low: 67 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 88. Calm wind becoming northwest around 5 mph in the afternoon.

    High: 88 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 71. Calm wind.

    Low: 71 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 85. Chance of precipitation is 70%.

    High: 85 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 11pm, then showers likely between 11pm and 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.

    Low: 67 °F

    Showers
    Likely

  • Friday

    Friday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 83. Chance of precipitation is 40%.

    High: 83 °F

    Partly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 50%.

    Low: 68 °F

    Chance
    Showers

Detailed Forecast

Overnight
Mostly cloudy early, then becoming mostly clear, with a low around 71. Light northwest wind.
Tuesday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 86. North wind 5 to 7 mph.
Tuesday Night
Mostly clear, with a low around 67. Light northwest wind.
Wednesday
Sunny, with a high near 88. Calm wind becoming northwest around 5 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 71. Calm wind.
Thursday
A slight chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 85. Chance of precipitation is 70%.
Thursday Night
Showers likely and possibly a thunderstorm before 11pm, then showers likely between 11pm and 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Friday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 83. Chance of precipitation is 40%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 50%.
Saturday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 82. Chance of precipitation is 60%.
Saturday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 83. Chance of precipitation is 30%.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 65. Chance of precipitation is 30%.
Monday
Sunny, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Great Falls VA
 38.99°N 77.32°W (Elev. 351 ft)
Last Update:
1:15 am EDT Aug 18, 2026
Forecast Valid:
1am EDT Aug 18, 2026-6pm EDT Aug 24, 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