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

Tropical Storm Isaias in the Gulf; California Heat Continues

Tropical Storm Isaias is forecast to track toward the central U.S. Gulf Coast while strengthening into a hurricane on Thursday. Residents from Louisiana to the Florida Panhandle should closely monitor the latest updates. Much higher than typical October temperatures will continue across much of California through midweek. Temperatures are forecast to gradually cool beginning Thursday. Read More >

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Fair

46°F

8°C

Humidity 93%
Wind Speed Calm
Barometer 30.06 in (1018.1 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 7 Oct 7:52 am EDT
Extended Forecast for

Great Falls VA

  • Today

    Today: Sunny, with a high near 71. South wind 5 to 9 mph.

    High: 71 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 53. South wind 3 to 6 mph.

    Low: 53 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 77. Light southwest wind becoming northwest 6 to 11 mph in the morning. Winds could gust as high as 21 mph.

    High: 77 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 49. Northwest wind around 5 mph becoming calm in the evening.

    Low: 49 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 73. Northwest wind 3 to 6 mph.

    High: 73 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 73.

    High: 73 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers after 2am. Mostly cloudy, with a low around 57. Chance of precipitation is 20%.

    Low: 57 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Sunday

    Sunday: Showers likely, mainly after 2pm. Mostly cloudy, with a high near 69. Chance of precipitation is 70%.

    High: 69 °F

    Showers
    Likely

Detailed Forecast

Today
Sunny, with a high near 71. South wind 5 to 9 mph.
Tonight
Clear, with a low around 53. South wind 3 to 6 mph.
Thursday
Sunny, with a high near 77. Light southwest wind becoming northwest 6 to 11 mph in the morning. Winds could gust as high as 21 mph.
Thursday Night
Mostly clear, with a low around 49. Northwest wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 73. Northwest wind 3 to 6 mph.
Friday Night
Partly cloudy, with a low around 53.
Saturday
Mostly sunny, with a high near 73.
Saturday Night
A slight chance of showers after 2am. Mostly cloudy, with a low around 57. Chance of precipitation is 20%.
Sunday
Showers likely, mainly after 2pm. Mostly cloudy, with a high near 69. Chance of precipitation is 70%.
Sunday Night
Showers and possibly a thunderstorm before 2am, then showers likely. Low around 61. Chance of precipitation is 80%.
Columbus Day
Showers likely. Mostly cloudy, with a high near 71. Chance of precipitation is 60%.
Monday Night
Mostly cloudy, with a low around 58.
Tuesday
Partly sunny, with a high near 72.
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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:
7:52 am EDT Oct 7, 2026
Forecast Valid:
8am EDT Oct 7, 2026-6pm EDT Oct 13, 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