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

Heat Wave and Severe Thunderstorms this Independence Day

A prolonged, dangerous heat wave will persist through the Independence Day weekend across the Ohio Valley, Midwest, and Mid-Atlantic. Numerous temperature records are expected. Clusters of severe thunderstorms will move across parts of the Allegheny Plateau into Mid Atlantic this Independence Day, with potential for widespread damaging winds. Additional severe thunderstorms in the Great Plains. Read More >

Hazardous Weather Conditions

Current conditions at

Washington/Reagan National Airport, DC (KDCA)

Lat: 38.85°NLon: 77.03°WElev: 13ft.

Light Rain

78°F

26°C

Humidity 71%
Wind Speed S 10 G 22 mph
Barometer 29.98 in (1015.1 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 4 Jul 9:52 pm EDT
Extended Forecast for

McLean VA

  • Tonight

    Tonight: Scattered showers and thunderstorms. Some of the storms could be severe. Mostly cloudy, with a low around 75. Light west wind. Chance of precipitation is 50%.

    Low: 75 °F

    Severe
    Thunderstorms
    then Chance
    Showers

  • Sunday

    Sunday: A chance of showers and thunderstorms, mainly after 4pm. Sunny, then becoming mostly cloudy during the afternoon, with a high near 96. Heat index values as high as 105. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 30%.

    High: 96 °F

    Mostly Sunny
    then Chance
    Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms between midnight and 2am, then a chance of showers after 2am. Low around 71. East wind 3 to 8 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 71 °F

    Showers then
    Chance
    Showers

  • Monday

    Monday: Showers likely, then showers and possibly a thunderstorm after 11am. High near 85. Northeast wind 3 to 5 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 85 °F

    Showers
    Likely then
    Showers

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm before 2am, then a slight chance of showers. Low around 69. East wind 3 to 5 mph. Chance of precipitation is 80%.

    Low: 69 °F

    Showers

  • Tuesday

    Tuesday: A slight chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 83. Chance of precipitation is 60%.

    High: 83 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 8pm, then a slight chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.

    Low: 67 °F

    Showers
    Likely then
    Slight Chance
    T-storms

  • Wednesday

    Wednesday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 69.

    Low: 69 °F

    Partly Cloudy

Detailed Forecast

Tonight
Scattered showers and thunderstorms. Some of the storms could be severe. Mostly cloudy, with a low around 75. Light west wind. Chance of precipitation is 50%.
Sunday
A chance of showers and thunderstorms, mainly after 4pm. Sunny, then becoming mostly cloudy during the afternoon, with a high near 96. Heat index values as high as 105. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 30%.
Sunday Night
Showers and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms between midnight and 2am, then a chance of showers after 2am. Low around 71. East wind 3 to 8 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Monday
Showers likely, then showers and possibly a thunderstorm after 11am. High near 85. Northeast wind 3 to 5 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
Showers and possibly a thunderstorm before 2am, then a slight chance of showers. Low around 69. East wind 3 to 5 mph. Chance of precipitation is 80%.
Tuesday
A slight chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 83. Chance of precipitation is 60%.
Tuesday Night
Showers likely and possibly a thunderstorm before 8pm, then a slight chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Wednesday
Mostly sunny, with a high near 85.
Wednesday Night
Partly cloudy, with a low around 69.
Thursday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 91. Chance of precipitation is 30%.
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. Partly sunny, with a high near 93. Chance of precipitation is 50%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Chance of precipitation is 40%.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 89. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
McLean VA
 38.93°N 77.19°W (Elev. 299 ft)
Last Update:
9:12 pm EDT Jul 4, 2026
Forecast Valid:
10pm EDT Jul 4, 2026-6pm EDT Jul 11, 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