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

Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Central U.S. and Northeast; Critical Fire Weather in the Four Corners

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Severe thunderstorms are forecast from parts of the central High Plains into the Upper Midwest, and across parts of the Northeast. Critical fire weather conditions will continue across portions of the Four Corners and Great Basin. Read More >

Hazardous Weather Conditions

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Partly Cloudy

88°F

31°C

Humidity 50%
Wind Speed S 10 mph
Barometer 30.05 in (1017.2 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index91°F (33°C)
Last update 30 Jun 5:52 pm EDT
Extended Forecast for

Vienna VA

Extreme Heat Watch July 2, 11:00am until July 3, 08:00pm
Heat Advisory July 1, 11:00am until July 1, 08:00pm
Click here for hazard details and duration
Extreme Heat Watch
Heat Advisory

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Partly cloudy, with a low around 72. South wind 8 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 72 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers between 1pm and 2pm, then a slight chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 99. Heat index values as high as 106. Southwest wind 5 to 8 mph. Chance of precipitation is 20%.

    High: 99 °F

    Sunny then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 76. South wind around 8 mph, with gusts as high as 18 mph.

    Low: 76 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 101. Heat index values as high as 109. Southwest wind 3 to 5 mph.

    High: 101 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 79. Southwest wind 3 to 6 mph.

    Low: 79 °F

    Mostly Clear

  • Friday

    Friday: A slight chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 101. Chance of precipitation is 20%.

    High: 101 °F

    Sunny then
    Slight Chance
    T-storms

  • Friday Night

    Friday Night: Partly cloudy, with a low around 79.

    Low: 79 °F

    Partly Cloudy

  • Independence Day

    Independence Day: A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 99. Chance of precipitation is 50%.

    High: 99 °F

    Sunny then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 75. Chance of precipitation is 40%.

    Low: 75 °F

    Chance
    T-storms

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Partly cloudy, with a low around 72. South wind 8 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Wednesday
A slight chance of showers between 1pm and 2pm, then a slight chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 99. Heat index values as high as 106. Southwest wind 5 to 8 mph. Chance of precipitation is 20%.
Wednesday Night
Mostly clear, with a low around 76. South wind around 8 mph, with gusts as high as 18 mph.
Thursday
Sunny and hot, with a high near 101. Heat index values as high as 109. Southwest wind 3 to 5 mph.
Thursday Night
Mostly clear, with a low around 79. Southwest wind 3 to 6 mph.
Friday
A slight chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 101. Chance of precipitation is 20%.
Friday Night
Partly cloudy, with a low around 79.
Independence Day
A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 99. Chance of precipitation is 50%.
Saturday Night
A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 75. Chance of precipitation is 40%.
Sunday
Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 93. Chance of precipitation is 60%.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 73. Chance of precipitation is 60%.
Monday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 89. Chance of precipitation is 60%.
Monday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 71. Chance of precipitation is 60%.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 87. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Vienna VA
 38.91°N 77.25°W (Elev. 397 ft)
Last Update:
4:53 pm EDT Jun 30, 2026
Forecast Valid:
6pm EDT Jun 30, 2026-6pm EDT Jul 7, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation