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

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Mostly Cloudy

62°F

17°C

Humidity 73%
Wind Speed S 8 mph
Barometer 29.96 in (1014.3 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 14 May 4:52 am EDT
Extended Forecast for

Herndon VA

  • Today

    Today: Showers likely, then showers and possibly a thunderstorm after 5pm. High near 71. South wind 7 to 9 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 71 °F

    Scattered
    Showers then
    Showers

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 8pm, then showers likely. Patchy fog between 3am and 4am. Low around 61. Southeast wind 7 to 10 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 61 °F

    Showers and
    Patchy Fog

  • Wednesday

    Wednesday: Showers, with thunderstorms also possible after 2pm. Patchy fog before noon. High near 66. Northeast wind 7 to 9 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 66 °F

    Showers and
    Patchy Fog

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm. Cloudy, with a low around 59. Northeast wind around 8 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 59 °F

    Showers
    Likely

  • Thursday

    Thursday: A chance of showers, mainly before 8am. Mostly cloudy, with a high near 73. North wind 10 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    High: 73 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 77.

    High: 77 °F

    Partly Sunny

  • Friday Night

    Friday Night: Showers likely, mainly after 2am. Mostly cloudy, with a low around 62. Chance of precipitation is 60%.

    Low: 62 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 71. Chance of precipitation is 60%.

    High: 71 °F

    Showers
    Likely

Detailed Forecast

Today
Showers likely, then showers and possibly a thunderstorm after 5pm. High near 71. South wind 7 to 9 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and possibly a thunderstorm before 8pm, then showers likely. Patchy fog between 3am and 4am. Low around 61. Southeast wind 7 to 10 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
Showers, with thunderstorms also possible after 2pm. Patchy fog before noon. High near 66. Northeast wind 7 to 9 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
Showers likely and possibly a thunderstorm. Cloudy, with a low around 59. Northeast wind around 8 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
A chance of showers, mainly before 8am. Mostly cloudy, with a high near 73. North wind 10 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Thursday Night
Partly cloudy, with a low around 58.
Friday
Partly sunny, with a high near 77.
Friday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 62. Chance of precipitation is 60%.
Saturday
Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 71. Chance of precipitation is 60%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 59. Chance of precipitation is 50%.
Sunday
A chance of showers. Mostly sunny, with a high near 76. Chance of precipitation is 30%.
Sunday Night
Partly cloudy, with a low around 60.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 81. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
Herndon VA
 38.97°N 77.38°W (Elev. 354 ft)
Last Update:
4:40 am EDT May 14, 2024
Forecast Valid:
5am EDT May 14, 2024-6pm EDT May 20, 2024
 
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