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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%

Humid Start to Evening in McKinney; Heat Builds Tomorrow - Jul 16, 8 PM

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

McKinney residents face high humidity this evening with a dew point of 72F. Temperatures will climb to near 91F tomorrow with heat index values reaching 100.

Cody Esparza

July 17, 20262 min read

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

*As of Jul 16, 8 PM local time.*

Current Conditions and Humidity

It is currently Thursday evening in McKinney, TX, and the air feels heavy with moisture. The current air temperature stands at 75F, but the feels-like temperature is 77F due to the significant humidity. The relative humidity is at 89%, with a dew point of 72F, creating a muggy atmosphere.

Winds are blowing from the south-southeast at 9 mph, with gusts reaching up to 21 mph. Despite the moisture in the air, the sky remains clear overhead.

Forecast for Tonight and Tomorrow

Today saw a high near 87F and a low near 74F, with a 25% chance of precipitation. As the day transitions into tonight, there is a chance of showers and thunderstorms before 10pm. The sky will be mostly cloudy with a low around 74F.

Temperatures may rise to around 76F overnight. Winds will shift to south-southeast at 5 to 10 mph, and the chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch are possible.

Tomorrow looks significantly warmer and sunnier. Expect mostly sunny skies with a high near 91F. The heat index values could reach as high as 100, making it feel much hotter than the actual air temperature. South winds will blow at 5 to 10 mph, with gusts as high as 20 mph. The chance of precipitation drops to 10%.

Safety and Preparedness

With the heat index expected to hit 100 tomorrow, it is crucial to stay hydrated and limit midday exertion. Wear lightweight, light-colored clothing and seek air-conditioned environments when possible. Check on elderly neighbors or those without adequate cooling, as high heat can be dangerous.

While there are no active National Weather Service alerts or warnings in effect, the combination of high heat and humidity requires caution. Plan outdoor activities for the cooler morning or evening hours if possible.

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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