National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Overcast

29°F

-2°C

Humidity 89%
Wind Speed NE 3 mph
Barometer 30.04 in (1017.6 mb)
Dewpoint 26°F (-3°C)
Visibility 8.00 mi
Last update 5 Dec 6:52 pm EST
Extended Forecast for

3 Miles SSW Herndon VA

Winter Weather Advisory until December 6, 01:00am
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory until December 6, 01:00am

    NOW until 1:00am Sat

    Winter Weather Advisory

  • Tonight

    Low: 26 °F

    Freezing Rain
    and Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 11am. Otherwise, partly sunny, with a high near 42. Calm wind.

    High: 42 °F

    Patchy Fog
    then Partly
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 26. Calm wind.

    Low: 26 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 43. Calm wind becoming south around 5 mph.

    High: 43 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 26. Calm wind becoming north 5 to 8 mph after midnight.

    Low: 26 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 34.

    High: 34 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 18.

    Low: 18 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 38.

    High: 38 °F

    Mostly Sunny

Detailed Forecast

Tonight
Freezing rain, mainly before 1am. Patchy fog. Low around 26. Calm wind. Chance of precipitation is 80%. Total nighttime ice accumulation of less than a 0.1 of an inch possible.
Saturday
Patchy fog before 11am. Otherwise, partly sunny, with a high near 42. Calm wind.
Saturday Night
Partly cloudy, with a low around 26. Calm wind.
Sunday
Partly sunny, with a high near 43. Calm wind becoming south around 5 mph.
Sunday Night
Mostly cloudy, with a low around 26. Calm wind becoming north 5 to 8 mph after midnight.
Monday
Partly sunny, with a high near 34.
Monday Night
Partly cloudy, with a low around 18.
Tuesday
Mostly sunny, with a high near 38.
Tuesday Night
Mostly cloudy, with a low around 29.
Wednesday
Mostly cloudy, with a high near 46.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 34. Chance of precipitation is 30%.
Thursday
Partly sunny, with a high near 46.
Thursday Night
Partly cloudy, with a low around 29.
Friday
Partly sunny, with a high near 42.
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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:
6:53 pm EST Dec 5, 2025
Forecast Valid:
7pm EST Dec 5, 2025-6pm EST Dec 12, 2025
 
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