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

Significant Coastal Impacts to the Mid-Atlantic and Northeast; Tropical Storm Nolo to Impact Hawaii

A strong coastal storm will bring moderate to major coastal flooding, strong winds, heavy rainfall and high surf to the Mid-Atlantic and New England. Tropical Storm Nolo is expected to strengthen into a hurricane Thursday as it moves north toward the Big Island of Hawaii. Heavy rainfall will continue through Saturday, with locally catastrophic flooding possible. Hurricane Watch in effect. Read More >

Hazardous Weather Conditions

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

A Few Clouds

52°F

11°C

Humidity 80%
Wind Speed N 10 mph
Barometer 30.36 in (1028.1 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Wind Chill49°F (9°C)
Last update 24 Sep 5:52 am EDT
Extended Forecast for

Herndon VA

  • Today

    Today: Partly sunny, with a high near 65. Northeast wind around 11 mph, with gusts as high as 21 mph.

    High: 65 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 47. North wind 6 to 8 mph.

    Low: 47 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 70. North wind 10 to 14 mph, with gusts as high as 25 mph.

    High: 70 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 52. North wind 8 to 10 mph, with gusts as high as 18 mph.

    Low: 52 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 73. Northwest wind 11 to 14 mph, with gusts as high as 26 mph.

    High: 73 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 70.

    High: 70 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 55.

    Low: 55 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 70.

    High: 70 °F

    Mostly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 65. Northeast wind around 11 mph, with gusts as high as 21 mph.
Tonight
Partly cloudy, with a low around 47. North wind 6 to 8 mph.
Friday
Sunny, with a high near 70. North wind 10 to 14 mph, with gusts as high as 25 mph.
Friday Night
Mostly clear, with a low around 52. North wind 8 to 10 mph, with gusts as high as 18 mph.
Saturday
Sunny, with a high near 73. Northwest wind 11 to 14 mph, with gusts as high as 26 mph.
Saturday Night
Partly cloudy, with a low around 55.
Sunday
Mostly sunny, with a high near 70.
Sunday Night
Mostly cloudy, with a low around 55.
Monday
Mostly sunny, with a high near 70.
Monday Night
Partly cloudy, with a low around 55.
Tuesday
Mostly sunny, with a high near 74.
Tuesday Night
Mostly clear, with a low around 55.
Wednesday
Mostly sunny, with a high near 78.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Herndon VA
 38.97°N 77.38°W (Elev. 354 ft)
Last Update:
4:53 am EDT Sep 24, 2026
Forecast Valid:
6am EDT Sep 24, 2026-6pm EDT Sep 30, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation