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

Areas of Excessive Rainfall and Severe Thunderstorms; Typhoon Watch for Guam/CNMI

Heavy to excessive rainfall will continue today from the Texas Big Bend region into southern Oklahoma. Locally considerable flash and urban flooding is possible, and river flooding will continue in central Oklahoma. Scattered severe thunderstorms are possible in parts of the Mid-Atlantic Friday. A Typhoon Watch has been issued for Guam and CNMI. Read More >

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Light Rain Fog/Mist

60°F

16°C

Humidity 90%
Wind Speed SE 5 mph
Barometer 30.16 in (1021.3 mb)
Dewpoint 57°F (14°C)
Visibility 5.00 mi
Last update 15 Oct 3:52 pm EDT
Extended Forecast for

Great Falls VA

  • This Afternoon

    This Afternoon: A chance of showers. Cloudy, with a high near 66. East wind around 5 mph. Chance of precipitation is 30%.

    High: 66 °F

    Chance
    Showers

  • Tonight

    Tonight: A chance of showers, mainly before 1am. Patchy fog after 5am. Otherwise, cloudy, with a low around 58. Southeast wind 3 to 6 mph. Chance of precipitation is 40%.

    Low: 58 °F

    Chance
    Showers and
    Patchy Fog

  • Friday

    Friday: A slight chance of showers before 8am, then a chance of showers and thunderstorms after 5pm. Patchy fog before 10am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 82. Southwest wind 10 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.

    High: 82 °F

    Patchy Fog
    then Chance
    T-storms

  • Friday Night

    Friday Night: Showers and thunderstorms before 4am, then a chance of showers. Low around 48. Northwest wind 11 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 48 °F

    Chance
    T-storms then
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 54. North wind around 16 mph, with gusts as high as 29 mph.

    High: 54 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 57.

    High: 57 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

Detailed Forecast

This Afternoon
A chance of showers. Cloudy, with a high near 66. East wind around 5 mph. Chance of precipitation is 30%.
Tonight
A chance of showers, mainly before 1am. Patchy fog after 5am. Otherwise, cloudy, with a low around 58. Southeast wind 3 to 6 mph. Chance of precipitation is 40%.
Friday
A slight chance of showers before 8am, then a chance of showers and thunderstorms after 5pm. Patchy fog before 10am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 82. Southwest wind 10 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
Friday Night
Showers and thunderstorms before 4am, then a chance of showers. Low around 48. Northwest wind 11 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
Mostly sunny, with a high near 54. North wind around 16 mph, with gusts as high as 29 mph.
Saturday Night
Mostly clear, with a low around 36.
Sunday
Sunny, with a high near 57.
Sunday Night
Mostly clear, with a low around 39.
Monday
Sunny, with a high near 62.
Monday Night
Mostly clear, with a low around 43.
Tuesday
Mostly sunny, with a high near 66.
Tuesday Night
Partly cloudy, with a low around 46.
Wednesday
Mostly sunny, with a high near 66.
Wednesday Night
Mostly clear, with a low around 45.
Thursday
Sunny, with a high near 65.
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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:
2:24 pm EDT Oct 15, 2026
Forecast Valid:
4pm EDT Oct 15, 2026-6pm EDT Oct 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation