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

50°F

10°C

Humidity 46%
Wind Speed SW 8 G 22 mph
Barometer 29.83 in (1010.1 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill47°F (8°C)
Last update 14 Mar 1:52 am EDT
Extended Forecast for

Great Falls VA

  • Overnight

    Overnight: Mostly clear, with a low around 43. West wind around 14 mph, with gusts as high as 25 mph.

    Low: 43 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 56. West wind 11 to 14 mph, with gusts as high as 24 mph.

    High: 56 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 39. Calm wind becoming east around 5 mph after midnight.

    Low: 39 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 59. Southeast wind 7 to 15 mph, with gusts as high as 25 mph.

    High: 59 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Showers. Low around 53. Southeast wind around 14 mph, with gusts as high as 25 mph. Chance of precipitation is 100%.

    Low: 53 °F

    Showers
    Likely then
    Showers

  • Monday

    Monday: Showers, with thunderstorms also possible after 2pm. High near 71. Breezy. Chance of precipitation is 100%.

    High: 71 °F

    Showers and
    Breezy

  • Monday Night

    Monday Night: Rain showers likely, mixing with snow after 11pm, then gradually ending. Mostly cloudy, with a low around 29. Chance of precipitation is 70%.

    Low: 29 °F

    Rain/Snow
    Likely

  • Tuesday

    Tuesday: Mostly sunny, with a high near 37.

    High: 37 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 23.

    Low: 23 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 43. West wind around 14 mph, with gusts as high as 25 mph.
Saturday
Mostly sunny, with a high near 56. West wind 11 to 14 mph, with gusts as high as 24 mph.
Saturday Night
Mostly cloudy, with a low around 39. Calm wind becoming east around 5 mph after midnight.
Sunday
Mostly cloudy, with a high near 59. Southeast wind 7 to 15 mph, with gusts as high as 25 mph.
Sunday Night
Showers. Low around 53. Southeast wind around 14 mph, with gusts as high as 25 mph. Chance of precipitation is 100%.
Monday
Showers, with thunderstorms also possible after 2pm. High near 71. Breezy. Chance of precipitation is 100%.
Monday Night
Rain showers likely, mixing with snow after 11pm, then gradually ending. Mostly cloudy, with a low around 29. Chance of precipitation is 70%.
Tuesday
Mostly sunny, with a high near 37.
Tuesday Night
Mostly clear, with a low around 23.
Wednesday
Partly sunny, with a high near 43.
Wednesday Night
Partly cloudy, with a low around 32.
Thursday
Mostly sunny, with a high near 54.
Thursday Night
Partly cloudy, with a low around 37.
Friday
Mostly sunny, with a high near 59.
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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:
1:53 am EDT Mar 14, 2026
Forecast Valid:
2am EDT Mar 14, 2026-6pm EDT Mar 20, 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