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

Extreme Heat and Excessive Rainfall Today

Dangerous and extreme heat will remain across portions of the southern U.S. this week. A heat wave over the Southwest U.S. will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Multiple rounds of thunderstorms will produce heavy to excessive rainfall with significant flash flooding across portions of southern New England today. Read More >

Hazardous Weather Conditions

Current conditions at

McKinney - McKinney National Airport (KTKI)

Lat: 33.18°NLon: 96.59°WElev: 584ft.

Fair

96°F

36°C

Humidity 44%
Wind Speed SE 12 mph
Barometer 29.87 in (1010.6 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index103°F (39°C)
Last update 29 Jul 3:53 pm CDT
Extended Forecast for

Farmersville TX

Heat Advisory July 29, 04:03pm until July 30, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 29, 04:03pm until July 30, 08:00pm

    NOW until 8:00pm Thu

    Heat Advisory

  • Tonight

    Low: 76 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny and hot, with a high near 99. Heat index values as high as 106. South wind 5 to 10 mph.

    High: 99 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 77. South wind 5 to 10 mph.

    Low: 77 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 99. Heat index values as high as 103. Southwest wind around 10 mph.

    High: 99 °F

    Hot

  • Friday Night

    Friday Night: Partly cloudy, with a low around 77. South southwest wind 5 to 10 mph.

    Low: 77 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 94. North wind 10 to 15 mph.

    High: 94 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 71. North northeast wind 5 to 10 mph.

    Low: 71 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 91. North wind 5 to 10 mph.

    High: 91 °F

    Sunny

Detailed Forecast

Tonight
Partly cloudy, with a low around 76. South southeast wind around 5 mph.
Thursday
Sunny and hot, with a high near 99. Heat index values as high as 106. South wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 77. South wind 5 to 10 mph.
Friday
Sunny and hot, with a high near 99. Heat index values as high as 103. Southwest wind around 10 mph.
Friday Night
Partly cloudy, with a low around 77. South southwest wind 5 to 10 mph.
Saturday
Sunny, with a high near 94. North wind 10 to 15 mph.
Saturday Night
Mostly clear, with a low around 71. North northeast wind 5 to 10 mph.
Sunday
Sunny, with a high near 91. North wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 71. North northeast wind 5 to 10 mph becoming east after midnight.
Monday
Sunny, with a high near 93.
Monday Night
Mostly clear, with a low around 74.
Tuesday
Sunny, with a high near 95.
Tuesday Night
Mostly clear, with a low around 74.
Wednesday
Sunny, with a high near 95.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Farmersville TX
 33.17°N 96.35°W (Elev. 650 ft)
Last Update:
1:26 pm CDT Jul 29, 2026
Forecast Valid:
4pm CDT Jul 29, 2026-6pm CDT Aug 5, 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