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Hurricane Erin Moving Away from the North Carolina Coast, Dangerous Surf & Rip Currents Continue; Hazardous Heat out West

Tropical storm conditions, storm surge flooding and coastal flooding continue today across the Outer Banks and portions of the Mid-Atlantic coast. Life-threatening rip currents and high surf continue to impact much of the East Coast through the end of the week. Hazardous, record heat will continue across the Western U.S. through the weekend. Read More >

Hazardous Weather Conditions

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Overcast

70°F

21°C

Humidity 76%
Wind Speed N 10 mph
Barometer 29.92 in (1013.0 mb)
Dewpoint 62°F (17°C)
Visibility 7.00 mi
Last update 21 Aug 1:52 pm EDT
Extended Forecast for

Herndon VA

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 72. North wind around 13 mph, with gusts as high as 23 mph.

    High: 72 °F

    Mostly Cloudy

  • Tonight

    Tonight: Partly cloudy, with a low around 63. North wind 3 to 7 mph.

    Low: 63 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 83. North wind 3 to 5 mph.

    High: 83 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 61. Southeast wind around 5 mph becoming light and variable in the evening.

    Low: 61 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 83. Light south wind increasing to 5 to 10 mph in the morning.

    High: 83 °F

    Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers after 2am. Partly cloudy, with a low around 67. Chance of precipitation is 20%.

    Low: 67 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Sunday

    Sunday: A chance of showers after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 50%.

    High: 84 °F

    Partly Sunny
    then Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers before 2am. Mostly cloudy, with a low around 65. Chance of precipitation is 40%.

    Low: 65 °F

    Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 72. North wind around 13 mph, with gusts as high as 23 mph.
Tonight
Partly cloudy, with a low around 63. North wind 3 to 7 mph.
Friday
Sunny, with a high near 83. North wind 3 to 5 mph.
Friday Night
Clear, with a low around 61. Southeast wind around 5 mph becoming light and variable in the evening.
Saturday
Sunny, with a high near 83. Light south wind increasing to 5 to 10 mph in the morning.
Saturday Night
A slight chance of showers after 2am. Partly cloudy, with a low around 67. Chance of precipitation is 20%.
Sunday
A chance of showers after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 50%.
Sunday Night
A chance of showers before 2am. Mostly cloudy, with a low around 65. Chance of precipitation is 40%.
Monday
Mostly sunny, with a high near 82.
Monday Night
Mostly clear, with a low around 60.
Tuesday
Mostly sunny, with a high near 78.
Tuesday Night
Mostly clear, with a low around 56.
Wednesday
Sunny, with a high near 76.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Herndon VA
 38.97°N 77.41°W (Elev. 348 ft)
Last Update:
1:30 pm EDT Aug 21, 2025
Forecast Valid:
2pm EDT Aug 21, 2025-6pm EDT Aug 27, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation