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5-day forecast / McKinney, TX

TuesdaySunny102° / 80°
WednesdaySunny101° / 81° 1%
ThursdayMostly Sunny101° / 81° 2%
FridayMostly Sunny103° / 82° 6%
SaturdaySunny100° / 76° 7%

McKinney Heat Index Hits 103F as Temperatures Climb - Jul 19, 4 PM

McKinney weather, updated every four hours — local forecasts you can trust.

Dangerous heat grips McKinney this Sunday afternoon with a heat index of 103F. Conditions remain hot and humid through tonight, with temperatures rising further tomorrow.

Cody Esparza

July 19, 20261 min read

National Weather Service radar for North Texas (KFWS)
National Weather Service radar for North Texas (KFWS)

*As of Jul 19, 4 PM local time.*

Dangerous Heat Conditions

McKinney is experiencing dangerous heat levels this Sunday afternoon. The air temperature stands at 93F, but the combination of heat and humidity pushes the feels-like temperature to 103F. Relative humidity is at 53%, with a dew point of 73F, creating a muggy atmosphere. Winds are blowing from the south at 11 mph, with gusts reaching 11 mph, under a clear sky.

Forecast Outlook

Today will be mostly sunny with a high near 97F. Temperatures are expected to fall to around 95F in the afternoon. The heat index will reach as high as 106.

South winds will continue at 5 to 10 mph. Tonight will be mostly clear, with a low around 78F. Temperatures will rise to around 80F overnight.

The heat index will remain high at 103. South winds will persist at 5 to 10 mph.

Tomorrow will be sunny with a high near 101F. The heat index will climb to 108. South southwest winds will blow at 5 to 10 mph. Tomorrow night will be clear, with a low around 80F. Temperatures will rise to around 82F overnight. The heat index will reach 106. South southwest winds will continue at 5 to 10 mph.

Safety Reminders

There are no active National Weather Service or NOAA weather alerts for this area. However, the extreme heat poses significant risks. Residents should stay hydrated and limit midday exertion to avoid heat-related illnesses.

Check on neighbors, especially the elderly and those with health conditions, to ensure they are safe in the heat. Keep vehicles and pets out of direct sunlight, and never leave anyone in a parked car. Monitor local news for updates on changing conditions.

National Weather Service radar for North Texas (KFWS)

Sources

https://radar.weather.gov

https://api.weather.gov

https://open-meteo.com

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Cody Esparza

Cody Esparza covers McKinney city hall, the council, and county government.

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