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

60°F

16°C

Humidity 44%
Wind Speed S 12 G 22 mph
Barometer 30.01 in (1016.3 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 26 Mar 9:52 am EDT
Extended Forecast for

Great Falls VA

  • Today

    Today: Mostly sunny, with a high near 77. Southwest wind 9 to 13 mph, with gusts as high as 22 mph.

    High: 77 °F

    Mostly Sunny

  • Tonight

    Tonight: A chance of rain, mainly after 5am. Increasing clouds, with a low around 51. Southwest wind 11 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.

    Low: 51 °F

    Mostly Cloudy
    then Chance
    Rain

  • Friday

    Friday: Rain, mainly after 7am. Temperature falling to around 51 by 5pm. North wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 61 °F⇓

    Rain

  • Friday Night

    Friday Night: A chance of rain before 2am. Cloudy during the early evening, then gradual clearing, with a low around 34. Northwest wind 5 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 30%.

    Low: 34 °F

    Chance Rain

  • Saturday

    Saturday: Sunny, with a high near 48. Northwest wind 10 to 13 mph, with gusts as high as 21 mph.

    High: 48 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 32.

    Low: 32 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 45.

    Low: 45 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 64.

    High: 64 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 77. Southwest wind 9 to 13 mph, with gusts as high as 22 mph.
Tonight
A chance of rain, mainly after 5am. Increasing clouds, with a low around 51. Southwest wind 11 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.
Friday
Rain, mainly after 7am. Temperature falling to around 51 by 5pm. North wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
A chance of rain before 2am. Cloudy during the early evening, then gradual clearing, with a low around 34. Northwest wind 5 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 30%.
Saturday
Sunny, with a high near 48. Northwest wind 10 to 13 mph, with gusts as high as 21 mph.
Saturday Night
Mostly clear, with a low around 32.
Sunday
Sunny, with a high near 58.
Sunday Night
Partly cloudy, with a low around 45.
Monday
Partly sunny, with a high near 64.
Monday Night
A chance of rain after 8pm. Mostly cloudy, with a low around 53. Chance of precipitation is 30%.
Tuesday
A chance of rain. Mostly cloudy, with a high near 71. Chance of precipitation is 40%.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 55. Chance of precipitation is 40%.
Wednesday
A chance of rain. Partly sunny, with a high near 77. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
Great Falls VA
 39.01°N 77.29°W (Elev. 348 ft)
Last Update:
9:22 am EDT Mar 26, 2026
Forecast Valid:
10am EDT Mar 26, 2026-6pm EDT Apr 1, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation