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Excessive Rainfall Potential for the Southeast; Heat Expands for Center of the Nation; Critical Fire Weather for Pacific Northwest

Flash flooding threatens areas from the Tennessee Valley to the Carolinas as storms repeat along a stalled front. Monsoonal storms may trigger flooding in the Southwest. Dangerous heat expands across the Desert Southwest, Plains, mid-Mississippi Valley and Southern Tier. Critical fire weather for interior Pacific Northwest. Cooler, drier air brings brief relief to the Great Lakes and Northeast. Read More >

Hazardous Weather Conditions

Current conditions at

McKinney - McKinney National Airport (KTKI)

Lat: 33.18°NLon: 96.59°WElev: 584ft.

Fair

97°F

36°C

Humidity 39%
Wind Speed S 12 mph
Barometer 29.98 in (1014.1 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index102°F (39°C)
Last update 25 Jul 5:53 pm CDT
Extended Forecast for

McKinney TX

Heat Advisory July 26, 12:00pm until July 26, 08:00pm
Heat Advisory July 25, 06:48pm until July 25, 08:00pm
Click here for hazard details and duration
Heat Advisory
...
  •  
    Heat Advisory July 25, 06:48pm until July 25, 08:00pm

    NOW until 8:00pm Sat

    Heat Advisory

  • Tonight

    Low: 78 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 100. Heat index values as high as 109. Southwest wind 5 to 10 mph.

    High: 100 °F

    Hot

  • Sunday Night

    Sunday Night: Clear, with a low around 80. South wind 5 to 10 mph.

    Low: 80 °F

    Clear

  • Monday

    Monday: Sunny and hot, with a high near 102. Heat index values as high as 110. South southwest wind 5 to 10 mph.

    High: 102 °F

    Hot

  • Monday Night

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

    Low: 81 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 103. South southwest wind 5 to 10 mph.

    High: 103 °F

    Hot

  • Tuesday Night

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

    Low: 81 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 103. South southwest wind 5 to 10 mph.

    High: 103 °F

    Hot

Detailed Forecast

Tonight
Mostly clear, with a low around 78. South wind around 10 mph.
Sunday
Sunny and hot, with a high near 100. Heat index values as high as 109. Southwest wind 5 to 10 mph.
Sunday Night
Clear, with a low around 80. South wind 5 to 10 mph.
Monday
Sunny and hot, with a high near 102. Heat index values as high as 110. South southwest wind 5 to 10 mph.
Monday Night
Mostly clear, with a low around 81. South wind 5 to 10 mph.
Tuesday
Sunny and hot, with a high near 103. South southwest wind 5 to 10 mph.
Tuesday Night
Mostly clear, with a low around 81. South wind 5 to 10 mph.
Wednesday
Mostly sunny and hot, with a high near 103. South southwest wind 5 to 10 mph.
Wednesday Night
Mostly clear, with a low around 81. South southeast wind 5 to 10 mph.
Thursday
Mostly sunny and hot, with a high near 102.
Thursday Night
Mostly clear, with a low around 81.
Friday
Mostly sunny and hot, with a high near 102.
Friday Night
Mostly clear, with a low around 81.
Saturday
Mostly sunny and hot, with a high near 100.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
McKinney TX
 33.19°N 96.62°W (Elev. 587 ft)
Last Update:
6:11 pm CDT Jul 25, 2026
Forecast Valid:
6pm CDT Jul 25, 2026-6pm CDT Aug 1, 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