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Harvey's remnant is forecast to regain tropical cyclone strength in the next day or two. Once Harvey starts impacting the Texas coast, up to 10 inches of rain will be possible over the next week. Another disturbance on the southern tip of Florida is not expected to strengthen, but it's slow movement could add up to 7 inches of rain over the next week. Heavy rain may produce flash flooding. Read More >

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Overcast

75°F

24°C

Humidity 82%
Wind Speed NW 9 mph
Barometer 29.82 in (1009.4 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 23 Aug 4:52 am EDT
Extended Forecast for

Herndon VA

  • Overnight

    Overnight: A chance of showers.  Mostly cloudy, with a low around 72. Light west wind.  Chance of precipitation is 30%.

    Chance
    Showers

    Low: 72 °F

  • Wednesday

    Wednesday: A slight chance of showers before 3pm.  Partly sunny, with a high near 83. North wind 6 to 9 mph.  Chance of precipitation is 20%.

    Slight Chance
    Showers

    High: 83 °F

  • Wednesday
    Night

    Wednesday Night: Partly cloudy, with a low around 61. North wind around 7 mph.

    Partly Cloudy

    Low: 61 °F

  • Thursday

    Thursday: Mostly sunny, with a high near 80. North wind around 6 mph.

    Mostly Sunny

    High: 80 °F

  • Thursday
    Night

    Thursday Night: Mostly cloudy, with a low around 60. North wind 3 to 5 mph.

    Mostly Cloudy

    Low: 60 °F

  • Friday

    Friday: Mostly sunny, with a high near 78.

    Mostly Sunny

    High: 78 °F

  • Friday
    Night

    Friday Night: Mostly clear, with a low around 58.

    Mostly Clear

    Low: 58 °F

  • Saturday

    Saturday: Mostly sunny, with a high near 78.

    Mostly Sunny

    High: 78 °F

  • Saturday
    Night

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

    Partly Cloudy

    Low: 58 °F

Detailed Forecast

Overnight
A chance of showers. Mostly cloudy, with a low around 72. Light west wind. Chance of precipitation is 30%.
Wednesday
A slight chance of showers before 3pm. Partly sunny, with a high near 83. North wind 6 to 9 mph. Chance of precipitation is 20%.
Wednesday Night
Partly cloudy, with a low around 61. North wind around 7 mph.
Thursday
Mostly sunny, with a high near 80. North wind around 6 mph.
Thursday Night
Mostly cloudy, with a low around 60. North wind 3 to 5 mph.
Friday
Mostly sunny, with a high near 78.
Friday Night
Mostly clear, with a low around 58.
Saturday
Mostly sunny, with a high near 78.
Saturday Night
Partly cloudy, with a low around 58.
Sunday
Mostly sunny, with a high near 77.
Sunday Night
Partly cloudy, with a low around 59.
Monday
Mostly sunny, with a high near 78.
Monday Night
Partly cloudy, with a low around 60.
Tuesday
Partly sunny, with a high near 76.
Click Map For Forecast
Point Forecast:
Herndon VA
 38.97°N 77.38°W (Elev. 354 ft)
4:27 am EDT Aug 23, 2017
5am EDT Aug 23, 2017-6pm EDT Aug 29, 2017
 
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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