Heat Persists in the Southwest; Elevated to Critical Fire Weather in the Great Basin; Poor Air Quality in the West

Dangerous heat will persist across the Southwest U.S. through this week, easing by next week. The heat will focus further east in the Great Plains and Mississippi Valley beginning next week. Elevated to locally critical fire weather conditions will persist for the Great Basin today. Poor air quality lingers for the Northwest, Great Basin, Central Rockies into the Plains. Read More >

Hazardous Weather Conditions

Current conditions at

Dallas/Fort Worth International Airport (KDFW)

Lat: 32.9°NLon: 97.02°WElev: 541ft.

Mostly Cloudy

96°F

36°C

Humidity 36%
Wind Speed S 13 mph
Barometer 29.94 in (1012.6 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index99°F (37°C)
Last update 4 Aug 12:53 pm CDT
Extended Forecast for

Lewisville TX

  • This Afternoon

    This Afternoon: Sunny and hot, with a high near 102. Heat index values as high as 105. South southeast wind around 5 mph.

    High: 102 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 81. South southeast wind around 10 mph.

    Low: 81 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 102. South wind 5 to 10 mph.

    High: 102 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 81. South wind 5 to 10 mph.

    Low: 81 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 101. South southwest wind 5 to 10 mph.

    High: 101 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 81. South southeast wind around 10 mph.

    Low: 81 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 99. South wind around 5 mph.

    High: 99 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 80. South southeast wind 5 to 10 mph.

    Low: 80 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 99. South wind around 5 mph.

    High: 99 °F

    Hot

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 102. Heat index values as high as 105. South southeast wind around 5 mph.
Tonight
Mostly clear, with a low around 81. South southeast wind around 10 mph.
Wednesday
Sunny and hot, with a high near 102. South wind 5 to 10 mph.
Wednesday Night
Mostly clear, with a low around 81. South wind 5 to 10 mph.
Thursday
Sunny and hot, with a high near 101. South southwest wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 81. South southeast wind around 10 mph.
Friday
Sunny and hot, with a high near 99. South wind around 5 mph.
Friday Night
Mostly clear, with a low around 80. South southeast wind 5 to 10 mph.
Saturday
Sunny and hot, with a high near 99. South wind around 5 mph.
Saturday Night
Mostly clear, with a low around 80.
Sunday
Sunny and hot, with a high near 99.
Sunday Night
Mostly clear, with a low around 80.
Monday
Sunny and hot, with a high near 99.
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ABOUT THIS FORECAST

 
Point Forecast:
Lewisville TX
 33.05°N 97°W (Elev. 531 ft)
11:31 am CDT Aug 4, 2026
1pm CDT Aug 4, 2026-6pm CDT Aug 10, 2026
 
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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