Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Fog/Mist

67°F

19°C

Humidity 100%
Wind Speed Calm
Barometer 30.01 in (1016.0 mb)
Dewpoint 67°F (19°C)
Visibility 1.00 mi
Last update 17 Jun 6:52 am EDT
Extended Forecast for

Herndon VA

Flood Watch June 17, 11:00am until June 17, 10:00pm
Click here for hazard details and duration
Flood Watch
  • Today

    Today: A chance of rain before 11am, then a 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

    Slight Chance
    Showers and
    Patchy Fog
    then Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely before 2am, then a slight chance of showers between 2am and 3am. Some of the storms could produce heavy rainfall.  Mostly cloudy, with a low around 71. Southeast wind around 6 mph.  Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 71 °F

    Heavy Rain
    then 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%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    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. Southwest wind 7 to 11 mph, with gusts as high as 21 mph.  Chance of precipitation is 60%.

    High: 93 °F

    Sunny then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 8pm, then a slight chance of showers between 8pm and 2am.  Partly cloudy, with a low around 66. Chance of precipitation is 60%.

    Low: 66 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • 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

  • Saturday

    Saturday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

Detailed Forecast

Today
A chance of rain before 11am, then a 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%.
Tonight
Showers and thunderstorms likely before 2am, then a slight chance of showers between 2am and 3am. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 71. Southeast wind around 6 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.
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%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Juneteenth
Showers likely and possibly a thunderstorm after 2pm. Mostly sunny, with a high near 93. Southwest wind 7 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.
Thursday Night
Showers likely and possibly a thunderstorm before 8pm, then a slight chance of showers between 8pm and 2am. 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.
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ABOUT THIS FORECAST

 
Point Forecast:
Herndon VA
 38.97°N 77.38°W (Elev. 354 ft)
7:29 am EDT Jun 17, 2025
7am EDT Jun 17, 2025-6pm EDT Jun 23, 2025
 
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Additional Resources

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