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

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Hazardous Weather Conditions

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Mostly Cloudy

71°F

22°C

Humidity 87%
Wind Speed NW 5 mph
Barometer 30.00 in (1015.7 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 28 Aug 7:52 am EDT
Extended Forecast for

Tysons Corner VA

  • Today

    Today: A slight chance of showers between 11am and 2pm, then a slight chance of showers and thunderstorms after 2pm. Patchy fog before 9am. Otherwise, mostly sunny, with a high near 86. North wind 3 to 5 mph. Chance of precipitation is 20%.

    High: 86 °F

    Slight Chance
    T-storms and
    Patchy Fog

  • Tonight

    Tonight: Partly cloudy, with a low around 65. North wind 3 to 6 mph.

    Low: 65 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 84. Northeast wind 6 to 8 mph.

    High: 84 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 67. East wind 3 to 5 mph.

    Low: 67 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 88. South wind 6 to 9 mph.

    High: 88 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 71.

    Low: 71 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 91.

    High: 91 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 73.

    Low: 73 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 93.

    High: 93 °F

    Mostly Sunny

Detailed Forecast

Today
A slight chance of showers between 11am and 2pm, then a slight chance of showers and thunderstorms after 2pm. Patchy fog before 9am. Otherwise, mostly sunny, with a high near 86. North wind 3 to 5 mph. Chance of precipitation is 20%.
Tonight
Partly cloudy, with a low around 65. North wind 3 to 6 mph.
Saturday
Mostly sunny, with a high near 84. Northeast wind 6 to 8 mph.
Saturday Night
Partly cloudy, with a low around 67. East wind 3 to 5 mph.
Sunday
Mostly sunny, with a high near 88. South wind 6 to 9 mph.
Sunday Night
Mostly cloudy, with a low around 71.
Monday
Mostly sunny, with a high near 91.
Monday Night
Partly cloudy, with a low around 73.
Tuesday
Mostly sunny, with a high near 93.
Tuesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 75. Chance of precipitation is 20%.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 93. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 74. Chance of precipitation is 30%.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 90. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Tysons Corner VA
 38.93°N 77.25°W (Elev. 377 ft)
Last Update:
7:52 am EDT Aug 28, 2026
Forecast Valid:
8am EDT Aug 28, 2026-6pm EDT Sep 3, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation