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

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Mostly Cloudy

72°F

22°C

Humidity 71%
Wind Speed S 6 mph
Barometer 30.00 in (1015.7 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 20 May 8:52 pm EDT
Extended Forecast for

Herndon VASimilar City Names

  • Tonight

    Tonight: Patchy fog after 5am. Otherwise, mostly clear, with a low around 59. South wind 3 to 6 mph.

    Low: 59 °F

    Mostly Clear
    then Patchy
    Fog

  • Tuesday

    Tuesday: Patchy fog before 9am. Otherwise, sunny, with a high near 82. South wind 3 to 7 mph.

    High: 82 °F

    Patchy Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 62. South wind around 7 mph.

    Low: 62 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 88. South wind 6 to 8 mph.

    High: 88 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 68. South wind around 7 mph.

    Low: 68 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 86. Chance of precipitation is 60%.

    High: 86 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.

    Low: 63 °F

    Showers
    Likely then
    Chance
    T-storms

  • Friday

    Friday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 80. Chance of precipitation is 30%.

    High: 80 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 60. Chance of precipitation is 40%.

    Low: 60 °F

    Chance
    T-storms

Detailed Forecast

Tonight
Patchy fog after 5am. Otherwise, mostly clear, with a low around 59. South wind 3 to 6 mph.
Tuesday
Patchy fog before 9am. Otherwise, sunny, with a high near 82. South wind 3 to 7 mph.
Tuesday Night
Mostly clear, with a low around 62. South wind around 7 mph.
Wednesday
Sunny, with a high near 88. South wind 6 to 8 mph.
Wednesday Night
Partly cloudy, with a low around 68. South wind around 7 mph.
Thursday
A slight chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 86. Chance of precipitation is 60%.
Thursday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.
Friday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 80. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 60. Chance of precipitation is 40%.
Saturday
A chance of showers. Partly sunny, with a high near 77. Chance of precipitation is 50%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 59. Chance of precipitation is 40%.
Sunday
A chance of showers. Partly sunny, with a high near 78. Chance of precipitation is 40%.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Chance of precipitation is 40%.
Memorial Day
A chance of showers and thunderstorms. Partly sunny, with a high near 79. Chance of precipitation is 50%.
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Disclaimer
Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
Herndon VASimilar City Names
 38.97°N 77.38°W (Elev. 354 ft)
Last Update:
7:30 pm EDT May 20, 2024
Forecast Valid:
9pm EDT May 20, 2024-6pm EDT May 27, 2024
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation