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

27°F

-3°C

Humidity 75%
Wind Speed Calm
Barometer 30.16 in (1021.6 mb)
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Last update 13 Jan 1:52 am EST
Extended Forecast for

Great Falls VA

  • Overnight

    Overnight: Mostly clear, with a low around 28. Calm wind.

    Low: 28 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 50. Calm wind becoming south 5 to 9 mph in the morning.

    High: 50 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of rain after 1am. Mostly cloudy, with a low around 40. Southwest wind 7 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.

    Low: 40 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Wednesday

    Wednesday: A chance of rain. Cloudy, with a high near 51. Southwest wind around 6 mph. Chance of precipitation is 40%.

    High: 51 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A chance of rain before 1am, then a chance of rain and snow between 1am and 4am, then a chance of snow after 4am. Mostly cloudy, with a low around 24. Light and variable wind becoming northwest 12 to 17 mph in the evening. Winds could gust as high as 31 mph. Chance of precipitation is 50%.

    Low: 24 °F

    Chance Rain
    then Chance
    Rain/Snow

  • Thursday

    Thursday: Partly sunny, with a high near 30.

    High: 30 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 17.

    Low: 17 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 34.

    High: 34 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 26.

    Low: 26 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 28. Calm wind.
Tuesday
Mostly sunny, with a high near 50. Calm wind becoming south 5 to 9 mph in the morning.
Tuesday Night
A slight chance of rain after 1am. Mostly cloudy, with a low around 40. Southwest wind 7 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Wednesday
A chance of rain. Cloudy, with a high near 51. Southwest wind around 6 mph. Chance of precipitation is 40%.
Wednesday Night
A chance of rain before 1am, then a chance of rain and snow between 1am and 4am, then a chance of snow after 4am. Mostly cloudy, with a low around 24. Light and variable wind becoming northwest 12 to 17 mph in the evening. Winds could gust as high as 31 mph. Chance of precipitation is 50%.
Thursday
Partly sunny, with a high near 30.
Thursday Night
Partly cloudy, with a low around 17.
Friday
Mostly sunny, with a high near 34.
Friday Night
Partly cloudy, with a low around 26.
Saturday
Mostly sunny, with a high near 42.
Saturday Night
Mostly cloudy, with a low around 23.
Sunday
Partly sunny, with a high near 33.
Sunday Night
Partly cloudy, with a low around 19.
M.L.King Day
Mostly sunny, with a high near 32.
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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:
12:53 am EST Jan 13, 2026
Forecast Valid:
2am EST Jan 13, 2026-6pm EST Jan 19, 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