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

Heavy Rainfall Threat Continues in the Southwest on Monday; Record Warmth in the Plains and Midwest

Remnant moisture from Tropical Storm Rachel will persist over portions of the Great Basin and Southwest on Monday, bringing a potential heavy to excessive rainfall risk. Well above average and potentially record breaking temperatures will develop across the Plains and Midwest early this week, spreading into the Lower Mississippi Valley and Southeast midweek. Read More >

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Mostly Cloudy

75°F

24°C

Humidity 58%
Wind Speed W 14 mph
Barometer 29.91 in (1012.8 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 12 Oct 4:52 pm EDT
Extended Forecast for

Herndon VA

  • Tonight

    Tonight: Partly cloudy, with a low around 55. Northwest wind 5 to 8 mph becoming calm in the evening.

    Low: 55 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 80. Calm wind becoming south 5 to 9 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 80 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 63. Southwest wind 3 to 8 mph.

    Low: 63 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 85. West wind 3 to 6 mph.

    High: 85 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of showers. Mostly cloudy, with a low around 61. West wind around 5 mph becoming north after midnight. Chance of precipitation is 20%.

    Low: 61 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: A chance of showers, mainly after 2pm. Mostly cloudy, with a high near 68. Chance of precipitation is 30%.

    High: 68 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers, mainly after 2am. Mostly cloudy, with a low around 59. Chance of precipitation is 30%.

    Low: 59 °F

    Chance
    Showers

  • Friday

    Friday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 76. Breezy. Chance of precipitation is 40%.

    High: 76 °F

    Chance
    Showers and
    Breezy

  • Friday Night

    Friday Night: A chance of showers before 8pm. Partly cloudy, with a low around 46. Chance of precipitation is 30%.

    Low: 46 °F

    Chance
    Showers then
    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 55. Northwest wind 5 to 8 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 80. Calm wind becoming south 5 to 9 mph in the afternoon. Winds could gust as high as 18 mph.
Tuesday Night
Clear, with a low around 63. Southwest wind 3 to 8 mph.
Wednesday
Sunny, with a high near 85. West wind 3 to 6 mph.
Wednesday Night
A slight chance of showers. Mostly cloudy, with a low around 61. West wind around 5 mph becoming north after midnight. Chance of precipitation is 20%.
Thursday
A chance of showers, mainly after 2pm. Mostly cloudy, with a high near 68. Chance of precipitation is 30%.
Thursday Night
A chance of showers, mainly after 2am. Mostly cloudy, with a low around 59. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 76. Breezy. Chance of precipitation is 40%.
Friday Night
A chance of showers before 8pm. Partly cloudy, with a low around 46. Chance of precipitation is 30%.
Saturday
Sunny, with a high near 56. Breezy.
Saturday Night
Mostly clear, with a low around 36.
Sunday
Sunny, with a high near 58.
Sunday Night
Mostly clear, with a low around 41.
Monday
Sunny, with a high near 64.
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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 pm EDT Oct 12, 2026
Forecast Valid:
5pm EDT Oct 12, 2026-6pm EDT Oct 19, 2026
 
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