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

30°F

-1°C

Humidity 92%
Wind Speed Calm
Barometer 29.94 in (1014.0 mb)
Dewpoint 28°F (-2°C)
Visibility 7.00 mi
Last update 6 Dec 5:52 am EST
Extended Forecast for

2 Miles S Herndon VA

Winter Weather Advisory December 6, 06:06am until December 6, 07:00am
Click here for hazard details and duration
...
  •  
    Winter Weather Advisory December 6, 06:06am until December 6, 07:00am

    NOW until 7:00am Sat

    Winter Weather Advisory

  • Today

    High: 42 °F

    Slight Chance
    Freezing Rain
    and Patchy
    Fog then
    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 27. Calm wind.

    Low: 27 °F

    Partly Cloudy

  • Sunday

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

    High: 43 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 26. Light and variable wind becoming north 5 to 10 mph after midnight.

    Low: 26 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 34. North wind 9 to 11 mph, with gusts as high as 21 mph.

    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 37.

    High: 37 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 29.

    Low: 29 °F

    Mostly Cloudy

Detailed Forecast

Today
A slight chance of freezing rain before 7am. Patchy fog before noon. Otherwise, partly sunny, with a high near 42. Calm wind. Chance of precipitation is 20%.
Tonight
Partly cloudy, with a low around 27. Calm wind.
Sunday
Partly sunny, with a high near 43. Calm wind becoming south around 5 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 26. Light and variable wind becoming north 5 to 10 mph after midnight.
Monday
Partly sunny, with a high near 34. North wind 9 to 11 mph, with gusts as high as 21 mph.
Monday Night
Partly cloudy, with a low around 18.
Tuesday
Mostly sunny, with a high near 37.
Tuesday Night
Mostly cloudy, with a low around 29.
Wednesday
Mostly cloudy, with a high near 47.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 33. Chance of precipitation is 30%.
Thursday
Partly sunny, with a high near 43.
Thursday Night
A chance of rain and snow. Mostly cloudy, with a low around 29. Chance of precipitation is 30%.
Friday
Partly sunny, with a high near 39.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles S Herndon VA
 38.95°N 77.39°W (Elev. 384 ft)
Last Update:
3:53 am EST Dec 6, 2025
Forecast Valid:
6am EST Dec 6, 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