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

Heavy to Excessive Rainfall for the Southwest;

Tropical moisture from Priscilla will bring a multi-day thunderstorm, widespread heavy rainfall and flash flooding event across the Southwest/Four Corners region. Flash flooding will be a concern in burn scars, slot canyons, and urban areas. Widespread storms are expected in central/South Florida with some isolated flash flooding possible. Read More >

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Fair

58°F

14°C

Humidity 53%
Wind Speed NW 7 mph
Barometer 30.29 in (1025.6 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 8 Oct 10:52 pm EDT
Extended Forecast for

Herndon VA

  • Tonight

    Tonight: Clear, with a low around 46. North wind around 10 mph.

    Low: 46 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 63. North wind 8 to 10 mph, with gusts as high as 20 mph.

    High: 63 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 39. Northeast wind 3 to 6 mph.

    Low: 39 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 65. Light and variable wind becoming southeast 5 to 7 mph in the morning.

    High: 65 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 48. Southeast wind around 5 mph becoming calm in the evening.

    Low: 48 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 69.

    High: 69 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A chance of showers after 2am. Mostly cloudy, with a low around 55. Chance of precipitation is 40%.

    Low: 55 °F

    Mostly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: A chance of showers. Partly sunny, with a high near 63. Chance of precipitation is 40%.

    High: 63 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers. Mostly cloudy, with a low around 51. Chance of precipitation is 40%.

    Low: 51 °F

    Chance
    Showers

Detailed Forecast

Tonight
Clear, with a low around 46. North wind around 10 mph.
Thursday
Sunny, with a high near 63. North wind 8 to 10 mph, with gusts as high as 20 mph.
Thursday Night
Clear, with a low around 39. Northeast wind 3 to 6 mph.
Friday
Sunny, with a high near 65. Light and variable wind becoming southeast 5 to 7 mph in the morning.
Friday Night
Partly cloudy, with a low around 48. Southeast wind around 5 mph becoming calm in the evening.
Saturday
Mostly cloudy, with a high near 69.
Saturday Night
A chance of showers after 2am. Mostly cloudy, with a low around 55. Chance of precipitation is 40%.
Sunday
A chance of showers. Partly sunny, with a high near 63. Chance of precipitation is 40%.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 51. Chance of precipitation is 40%.
Columbus Day
A chance of showers. Partly sunny, with a high near 62. Chance of precipitation is 30%.
Monday Night
A chance of showers. Mostly cloudy, with a low around 53. Chance of precipitation is 30%.
Tuesday
Partly sunny, with a high near 68.
Tuesday Night
Partly cloudy, with a low around 52.
Wednesday
Mostly sunny, with a high near 70.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Herndon VA
 38.97°N 77.38°W (Elev. 354 ft)
Last Update:
10:29 pm EDT Oct 8, 2025
Forecast Valid:
11pm EDT Oct 8, 2025-6pm EDT Oct 15, 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