7-Day Forecast 38.97°N 77.38°W (Text-Only)
NWS Forecast for: Herndon VA
Issued by: National Weather Service Baltimore, MD/Washington, D.C.
Last Update: 1:29 am EDT Jun 17, 2025
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  • Overnight

    Overnight: A chance of showers, mainly after 4am.  Patchy fog.  Otherwise, cloudy, with a low around 66. Light east wind.  Chance of precipitation is 30%.

    Low: 66 °F

    Chance
    Showers and
    Patchy Fog



  • Tuesday

    Tuesday: A chance of rain before 1pm, then a slight chance of showers and thunderstorms after 3pm.  Patchy fog before 9am.  Otherwise, mostly cloudy, with a high near 82. South wind 5 to 7 mph.  Chance of precipitation is 30%.

    High: 82 °F

    Chance
    Showers and
    Patchy Fog
    then Slight
    Chance
    T-storms

  • Tuesday
    Night

    Tuesday Night: A chance of showers and thunderstorms before 2am, then a slight chance of showers between 2am and 3am.  Mostly cloudy, with a low around 71. Southeast wind around 6 mph.  Chance of precipitation is 40%.

    Low: 71 °F

    Chance
    T-storms




  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm, mainly after 2pm.  Mostly cloudy through mid morning, then becoming sunny, with a high near 91. Southwest wind 6 to 10 mph.  Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 91 °F

    Chance
    Showers then
    Showers
    Likely


  • Wednesday
    Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 8pm.  Mostly clear, with a low around 73. Southwest wind around 6 mph.  Chance of precipitation is 60%.

    Low: 73 °F

    Showers
    Likely then
    Mostly Clear



  • Juneteenth

    Juneteenth: Showers likely and possibly a thunderstorm after 2pm.  Mostly sunny, with a high near 93. Chance of precipitation is 60%.

    High: 93 °F

    Sunny then
    Showers
    Likely



  • Thursday
    Night

    Thursday Night: Showers likely and possibly a thunderstorm before 8pm.  Partly cloudy, with a low around 66. Chance of precipitation is 60%.

    Low: 66 °F

    Showers
    Likely then
    Mostly Clear



  • Friday

    Friday: Sunny, with a high near 88.

    High: 88 °F

    Sunny





  • Friday
    Night

    Friday Night: Partly cloudy, with a low around 68.

    Low: 68 °F

    Partly Cloudy







  • Overnight: A chance of showers, mainly after 4am. Patchy fog. Otherwise, cloudy, with a low around 66. Light east wind. Chance of precipitation is 30%.

    Tuesday: A chance of rain before 1pm, then a slight chance of showers and thunderstorms after 3pm. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 82. South wind 5 to 7 mph. Chance of precipitation is 30%.

    Tuesday Night: A chance of showers and thunderstorms before 2am, then a slight chance of showers between 2am and 3am. Mostly cloudy, with a low around 71. Southeast wind around 6 mph. Chance of precipitation is 40%.

    Wednesday: Showers likely and possibly a thunderstorm, mainly after 2pm. Mostly cloudy through mid morning, then becoming sunny, with a high near 91. Southwest wind 6 to 10 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Wednesday Night: Showers likely and possibly a thunderstorm before 8pm. Mostly clear, with a low around 73. Southwest wind around 6 mph. Chance of precipitation is 60%.

    Juneteenth: Showers likely and possibly a thunderstorm after 2pm. Mostly sunny, with a high near 93. Chance of precipitation is 60%.

    Thursday Night: Showers likely and possibly a thunderstorm before 8pm. Partly cloudy, with a low around 66. Chance of precipitation is 60%.

    Friday: Sunny, with a high near 88.

    Friday Night: Partly cloudy, with a low around 68.

    Saturday: Sunny, with a high near 92.

    Saturday Night: Partly cloudy, with a low around 73.

    Sunday: Mostly sunny, with a high near 96.

    Sunday Night: Mostly clear, with a low around 76.

    Monday: Sunny and hot, with a high near 98.



    Herndon VA
     38.97°N 77.38°W (Elev. 354 ft)

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