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

48°F

9°C

Humidity 39%
Wind Speed S 8 mph
Barometer 29.70 in (1005.8 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 14 Jan 2:52 am EST
Extended Forecast for

Great Falls VA

  • Overnight

    Overnight: Cloudy, with a low around 41. Southwest wind around 9 mph.

    Low: 41 °F

    Cloudy

  • Wednesday

    Wednesday: A chance of rain, mainly before 10am. Cloudy, with a high near 51. Southwest wind around 6 mph. Chance of precipitation is 30%.

    High: 51 °F

    Chance Rain
    then Cloudy

  • Wednesday Night

    Wednesday Night: Rain likely before 3am, then a slight chance of snow between 3am and 4am. Cloudy, with a low around 24. Light and variable wind becoming northwest 9 to 14 mph in the evening. Winds could gust as high as 24 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    Low: 24 °F

    Chance Rain
    then
    Rain/Snow
    Likely

  • Thursday

    Thursday: Mostly sunny, with a high near 30. Northwest wind 14 to 17 mph, with gusts as high as 29 mph.

    High: 30 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 17. West wind 8 to 13 mph, with gusts as high as 23 mph.

    Low: 17 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 34.

    High: 34 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 28.

    Low: 28 °F

    Partly Cloudy

  • Saturday

    Saturday: A chance of rain and snow before 1pm. Partly sunny, with a high near 43. Chance of precipitation is 30%.

    High: 43 °F

    Chance
    Rain/Snow

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 22.

    Low: 22 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Cloudy, with a low around 41. Southwest wind around 9 mph.
Wednesday
A chance of rain, mainly before 10am. Cloudy, with a high near 51. Southwest wind around 6 mph. Chance of precipitation is 30%.
Wednesday Night
Rain likely before 3am, then a slight chance of snow between 3am and 4am. Cloudy, with a low around 24. Light and variable wind becoming northwest 9 to 14 mph in the evening. Winds could gust as high as 24 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Thursday
Mostly sunny, with a high near 30. Northwest wind 14 to 17 mph, with gusts as high as 29 mph.
Thursday Night
Mostly clear, with a low around 17. West wind 8 to 13 mph, with gusts as high as 23 mph.
Friday
Mostly sunny, with a high near 34.
Friday Night
Partly cloudy, with a low around 28.
Saturday
A chance of rain and snow before 1pm. Partly sunny, with a high near 43. Chance of precipitation is 30%.
Saturday Night
Mostly cloudy, with a low around 22.
Sunday
Mostly sunny, with a high near 31.
Sunday Night
Partly cloudy, with a low around 17.
M.L.King Day
Mostly sunny, with a high near 34.
Monday Night
Partly cloudy, with a low around 16.
Tuesday
Mostly sunny, with a high near 28.
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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 14, 2026
Forecast Valid:
3am EST Jan 14, 2026-6pm EST Jan 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