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.

Partly Cloudy

30°F

-1°C

Humidity 82%
Wind Speed S 9 mph
Barometer 29.86 in (1011.4 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill22°F (-6°C)
Last update 10 Dec 2:52 am EST
Extended Forecast for

3 Miles SSW Herndon VA

  • Overnight

    Overnight: Mostly cloudy, with a low around 29. South wind around 11 mph, with gusts as high as 21 mph.

    Low: 29 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain, mainly between 11am and 4pm. Cloudy, with a high near 46. South wind 13 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 40%.

    High: 46 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 29. Southwest wind 10 to 13 mph becoming northwest after midnight. Winds could gust as high as 20 mph.

    Low: 29 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 37. West wind 11 to 17 mph, with gusts as high as 28 mph.

    High: 37 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 24. West wind 5 to 9 mph.

    Low: 24 °F

    Partly Cloudy

  • Friday

    Friday: A chance of snow. Mostly cloudy, with a high near 37. Chance of precipitation is 40%.

    High: 37 °F

    Chance Snow

  • Friday Night

    Friday Night: A chance of snow before 1am. Mostly cloudy, with a low around 26. Chance of precipitation is 30%.

    Low: 26 °F

    Chance Snow

  • Saturday

    Saturday: Partly sunny, with a high near 42.

    High: 42 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A chance of snow after 1am. Mostly cloudy, with a low around 25. Chance of precipitation is 40%.

    Low: 25 °F

    Mostly Cloudy
    then Chance
    Snow

Detailed Forecast

Overnight
Mostly cloudy, with a low around 29. South wind around 11 mph, with gusts as high as 21 mph.
Wednesday
A chance of rain, mainly between 11am and 4pm. Cloudy, with a high near 46. South wind 13 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 40%.
Wednesday Night
Partly cloudy, with a low around 29. Southwest wind 10 to 13 mph becoming northwest after midnight. Winds could gust as high as 20 mph.
Thursday
Mostly sunny, with a high near 37. West wind 11 to 17 mph, with gusts as high as 28 mph.
Thursday Night
Partly cloudy, with a low around 24. West wind 5 to 9 mph.
Friday
A chance of snow. Mostly cloudy, with a high near 37. Chance of precipitation is 40%.
Friday Night
A chance of snow before 1am. Mostly cloudy, with a low around 26. Chance of precipitation is 30%.
Saturday
Partly sunny, with a high near 42.
Saturday Night
A chance of snow after 1am. Mostly cloudy, with a low around 25. Chance of precipitation is 40%.
Sunday
Mostly sunny, with a high near 34.
Sunday Night
Mostly clear, with a low around 16.
Monday
Sunny, with a high near 32.
Monday Night
Partly cloudy, with a low around 19.
Tuesday
Mostly sunny, with a high near 38.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Herndon VA
 38.93°N 77.42°W (Elev. 308 ft)
Last Update:
12:53 am EST Dec 10, 2025
Forecast Valid:
3am EST Dec 10, 2025-6pm EST Dec 16, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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