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

Hazardous Weather Conditions

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Light Rain Fog/Mist

67°F

19°C

Humidity 97%
Wind Speed NE 7 mph
Barometer 30.01 in (1015.9 mb)
Dewpoint 66°F (19°C)
Visibility 5.00 mi
Last update 18 Sep 4:52 am EDT
Extended Forecast for

Herndon VA

  • Overnight

    Overnight: Showers and possibly a thunderstorm. Low around 68. Northeast wind around 9 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 68 °F

    Showers

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm, mainly before 2pm, then scattered showers and thunderstorms after 2pm. Patchy fog between 8am and 11am. High near 73. Northeast wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 73 °F

    Showers and
    Patchy Fog

  • Wednesday Night

    Wednesday Night: Scattered showers and thunderstorms. Cloudy, with a low around 63. North wind 5 to 7 mph. Chance of precipitation is 30%.

    Low: 63 °F

    Scattered
    Showers

  • Thursday

    Thursday: Scattered showers, mainly before 11am. Mostly cloudy, with a high near 78. North wind around 8 mph. Chance of precipitation is 30%.

    High: 78 °F

    Scattered
    Showers

  • Thursday Night

    Thursday Night: A slight chance of showers before 11pm, then a slight chance of showers and thunderstorms between 11pm and 2am. Mostly cloudy, with a low around 60. North wind 3 to 5 mph. Chance of precipitation is 20%.

    Low: 60 °F

    Slight Chance
    T-storms

  • Friday

    Friday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

Detailed Forecast

Overnight
Showers and possibly a thunderstorm. Low around 68. Northeast wind around 9 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
Showers and possibly a thunderstorm, mainly before 2pm, then scattered showers and thunderstorms after 2pm. Patchy fog between 8am and 11am. High near 73. Northeast wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
Scattered showers and thunderstorms. Cloudy, with a low around 63. North wind 5 to 7 mph. Chance of precipitation is 30%.
Thursday
Scattered showers, mainly before 11am. Mostly cloudy, with a high near 78. North wind around 8 mph. Chance of precipitation is 30%.
Thursday Night
A slight chance of showers before 11pm, then a slight chance of showers and thunderstorms between 11pm and 2am. Mostly cloudy, with a low around 60. North wind 3 to 5 mph. Chance of precipitation is 20%.
Friday
Mostly sunny, with a high near 80.
Friday Night
Partly cloudy, with a low around 61.
Saturday
Mostly sunny, with a high near 77.
Saturday Night
Partly cloudy, with a low around 59.
Sunday
Mostly sunny, with a high near 73.
Sunday Night
Partly cloudy, with a low around 54.
Monday
Mostly sunny, with a high near 71.
Monday Night
Partly cloudy, with a low around 54.
Tuesday
Partly sunny, with a high near 74.
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ABOUT THIS FORECAST

 
Point Forecast:
Herndon VA
 38.97°N 77.38°W (Elev. 354 ft)
Last Update:
4:30 am EDT Sep 18, 2024
Forecast Valid:
5am EDT Sep 18, 2024-6pm EDT Sep 24, 2024
 
Forecast Discussion
 
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Additional Resources

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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