Three Weather Areas of Concern Today

Potential Tropical Cyclone Three will gradually approach the northern Gulf Coast with heavy rain and potential flooding. Meanwhile, a sharp cold front will produce severe thunderstorms with significant winds, hail, tornadoes and possible flooding across the Ohio Valley. Finally, a large dome of high pressure will continue the major heat wave over the West, extending into the central Plains. Read More >

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Mostly Cloudy

79°F

26°C

Humidity 52%
Wind Speed S 8 mph
Barometer 29.90 in (1012.1 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 18 Jun 8:52 pm EDT
Extended Forecast for

Herndon VA

  • Tonight

    Tonight: Mostly cloudy, with a low around 70. Southwest wind around 8 mph.

    Mostly Cloudy

    Low: 70 °F

  • Saturday

    Saturday: A slight chance of showers, then a chance of showers and thunderstorms after 11am.  Partly sunny, with a high near 89. West wind 6 to 10 mph.  Chance of precipitation is 50%.

    Slight Chance
    T-storms then
    Chance
    T-storms

    High: 89 °F

  • Saturday
    Night

    Saturday Night: A chance of showers and thunderstorms, mainly before 2am.  Mostly cloudy, with a low around 69. West wind 3 to 7 mph.  Chance of precipitation is 40%.

    Chance
    T-storms

    Low: 69 °F

  • Sunday

    Sunday: A slight chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 11am, then a chance of showers and thunderstorms after 11am.  Partly sunny, with a high near 91. West wind 5 to 7 mph.  Chance of precipitation is 30%.

    Chance
    Showers then
    Chance
    T-storms

    High: 91 °F

  • Sunday
    Night

    Sunday Night: A chance of showers and thunderstorms, mainly before 8pm.  Mostly cloudy, with a low around 71. South wind 5 to 7 mph.  Chance of precipitation is 30%.

    Chance
    T-storms

    Low: 71 °F

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 2pm.  Mostly sunny, with a high near 91. Chance of precipitation is 30%.

    Chance
    Showers then
    Chance
    T-storms

    High: 91 °F

  • Monday
    Night

    Monday Night: A chance of showers and thunderstorms.  Partly cloudy, with a low around 70. Chance of precipitation is 30%.

    Chance
    T-storms

    Low: 70 °F

  • Tuesday

    Tuesday: Showers likely, with thunderstorms also possible after 2pm.  Partly sunny, with a high near 84. Chance of precipitation is 70%.

    Showers
    Likely

    High: 84 °F

  • Tuesday
    Night

    Tuesday Night: A chance of thunderstorms before 8pm.  Partly cloudy, with a low around 56. Chance of precipitation is 30%.

    Chance
    T-storms then
    Partly Cloudy

    Low: 56 °F

Detailed Forecast

Tonight
Mostly cloudy, with a low around 70. Southwest wind around 8 mph.
Saturday
A slight chance of showers, then a chance of showers and thunderstorms after 11am. Partly sunny, with a high near 89. West wind 6 to 10 mph. Chance of precipitation is 50%.
Saturday Night
A chance of showers and thunderstorms, mainly before 2am. Mostly cloudy, with a low around 69. West wind 3 to 7 mph. Chance of precipitation is 40%.
Sunday
A slight chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 11am, then a chance of showers and thunderstorms after 11am. Partly sunny, with a high near 91. West wind 5 to 7 mph. Chance of precipitation is 30%.
Sunday Night
A chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 71. South wind 5 to 7 mph. Chance of precipitation is 30%.
Monday
A chance of showers, with thunderstorms also possible after 2pm. Mostly sunny, with a high near 91. Chance of precipitation is 30%.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 70. Chance of precipitation is 30%.
Tuesday
Showers likely, with thunderstorms also possible after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 70%.
Tuesday Night
A chance of thunderstorms before 8pm. Partly cloudy, with a low around 56. Chance of precipitation is 30%.
Wednesday
Sunny, with a high near 78.
Wednesday Night
Mostly clear, with a low around 58.
Thursday
Sunny, with a high near 83.
Thursday Night
Partly cloudy, with a low around 61.
Friday
Mostly sunny, with a high near 84.
Click Map For Forecast
Point Forecast:
Herndon VA
 38.97°N 77.38°W (Elev. 354 ft)
8:49 pm EDT Jun 18, 2021
9pm EDT Jun 18, 2021-6pm EDT Jun 25, 2021
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database