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

Dangerous Heat Wave Continues; Enhanced Area of Severe Thunderstorms Today

A prolonged, dangerous heat wave will continue today in the Midwest and Mississippi Valley, and persist through the Independence Day weekend across the Ohio Valley, Mid-South, and East Coast. Widespread moderate to extreme HeatRisk is forecast. Scattered wind damage and large hail are expected from severe thunderstorms impacting parts of Nebraska into Iowa today. Read More >

Hazardous Weather Conditions

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

A Few Clouds

98°F

37°C

Humidity 46%
Wind Speed W 7 mph
Barometer 29.97 in (1014.4 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index109°F (43°C)
Last update 3 Jul 5:52 pm EDT
Extended Forecast for

Oakton VA

Extreme Heat Warning July 4, 10:00am until July 4, 09:00pm
Extreme Heat Warning July 3, 06:06pm until July 3, 09:00pm
Click here for hazard details and duration
Extreme Heat Warning
...
  •  
    Extreme Heat Warning July 3, 06:06pm until July 3, 09:00pm

    NOW until 9:00pm Fri

    Extreme Heat Warning

  • Tonight

    Low: 77 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Independence Day

    Independence Day: A chance of showers and thunderstorms, mainly after 3pm. Mostly sunny and hot, with a high near 99. Heat index values as high as 107. Light and variable wind becoming southwest 5 to 7 mph in the afternoon. Chance of precipitation is 30%.

    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 73. South wind around 5 mph becoming calm after midnight. Chance of precipitation is 50%.

    Low: 73 °F

    Chance
    T-storms

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 94. Heat index values as high as 105. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 94 °F

    Mostly Sunny
    then Showers
    Likely

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm before 2am, then a slight chance of showers. Mostly cloudy, with a low around 71. East wind around 5 mph becoming light and variable in the evening. Chance of precipitation is 70%.

    Low: 71 °F

    Showers
    Likely

  • Monday

    Monday: A slight chance of showers before 11am, then a slight chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 86. Chance of precipitation is 70%.

    High: 86 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm before 2am, then a slight chance of showers. Mostly cloudy, with a low around 71. Chance of precipitation is 70%.

    Low: 71 °F

    Showers
    Likely

  • Tuesday

    Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 86. Chance of precipitation is 40%.

    High: 86 °F

    Slight Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms between 7pm and 11pm. Partly cloudy, with a low around 77. West wind 5 to 7 mph becoming calm. Chance of precipitation is 20%.
Independence Day
A chance of showers and thunderstorms, mainly after 3pm. Mostly sunny and hot, with a high near 99. Heat index values as high as 107. Light and variable wind becoming southwest 5 to 7 mph in the afternoon. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 73. South wind around 5 mph becoming calm after midnight. Chance of precipitation is 50%.
Sunday
Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 94. Heat index values as high as 105. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Showers likely and possibly a thunderstorm before 2am, then a slight chance of showers. Mostly cloudy, with a low around 71. East wind around 5 mph becoming light and variable in the evening. Chance of precipitation is 70%.
Monday
A slight chance of showers before 11am, then a slight chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 86. Chance of precipitation is 70%.
Monday Night
Showers likely and possibly a thunderstorm before 2am, then a slight chance of showers. Mostly cloudy, with a low around 71. Chance of precipitation is 70%.
Tuesday
A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 86. Chance of precipitation is 40%.
Tuesday Night
A chance of showers and thunderstorms before 2am, then a slight chance of showers. Mostly cloudy, with a low around 70. Chance of precipitation is 40%.
Wednesday
A chance of showers, mainly after 2pm. Partly sunny, with a high near 85. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 71. Chance of precipitation is 30%.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 88. Chance of precipitation is 20%.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 72. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 89. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
Oakton VA
 38.87°N 77.31°W (Elev. 400 ft)
Last Update:
4:53 pm EDT Jul 3, 2026
Forecast Valid:
6pm EDT Jul 3, 2026-6pm EDT Jul 10, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation