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

Autumn Temperatures for Eastern Third of the Country; Super Typhoon Approaching Guam

Cooler and less humid conditions for the eastern third of the nation as a cold slides off the east coast. Combination of dry and breezy conditions may result in spread of wildfires across the lower Mississippi Valley. In addition, fire weather conditions linger into portions of Southern California. For Guam, a super typhoon is approaching. Read More >

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Fair

37°F

3°C

Humidity 79%
Wind Speed Calm
Barometer 30.54 in (1034.4 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Last update 18 Oct 6:52 am EDT
Extended Forecast for

Herndon VA

  • Today

    Today: Areas of frost between 8am and 9am. Otherwise, sunny, with a high near 59. North wind around 6 mph.

    High: 59 °F

    Areas Frost
    then Sunny

  • Tonight

    Tonight: Clear, with a low around 38. Light northeast wind.

    Low: 38 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 63. North wind 6 to 9 mph.

    High: 63 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 45. North wind around 8 mph.

    Low: 45 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 66. North wind around 10 mph, with gusts as high as 20 mph.

    High: 66 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

Detailed Forecast

Today
Areas of frost between 8am and 9am. Otherwise, sunny, with a high near 59. North wind around 6 mph.
Tonight
Clear, with a low around 38. Light northeast wind.
Monday
Sunny, with a high near 63. North wind 6 to 9 mph.
Monday Night
Mostly clear, with a low around 45. North wind around 8 mph.
Tuesday
Sunny, with a high near 66. North wind around 10 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 44.
Wednesday
Sunny, with a high near 63.
Wednesday Night
Mostly clear, with a low around 45.
Thursday
Sunny, with a high near 65.
Thursday Night
Mostly clear, with a low around 47.
Friday
Sunny, with a high near 62.
Friday Night
Mostly clear, with a low around 46.
Saturday
Sunny, with a high near 60.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Herndon VA
 38.97°N 77.38°W (Elev. 354 ft)
Last Update:
4:53 am EDT Oct 18, 2026
Forecast Valid:
7am EDT Oct 18, 2026-6pm EDT Oct 24, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation