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5-day forecast / McKinney, TX

ThursdaySunny100° / 81° 3%
FridaySunny103° / 81° 1%
SaturdayMostly Sunny97° / 74° 8%
SundaySunny94° / 74° 1%
MondaySunny96° / 76°

Heat Advisory in Effect for McKinney as Temperatures Climb Near 100 - Jul 30, 8 AM

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

A Heat Advisory is active for McKinney, TX, with current feels-like temperatures at 88F. Today's high near 100F and humidity create dangerous heat index values up to 108.

Cody Esparza

July 30, 20262 min read

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

*As of Jul 30, 8 AM local time.*

Current Conditions and Alert Status

McKinney residents are under a Heat Advisory, which remains in effect until the evening hours today. The National Weather Service has issued this moderate-severity alert due to dangerously high temperatures and humidity levels that will make conditions feel significantly hotter than the actual air temperature.

As of this morning, the air temperature stands at 82F, but the heat index makes it feel like 88F. Humidity is quite high, with a dew point of 73F and relative humidity at 74%. Winds are currently blowing from the south southwest at 8 mph, with gusts reaching up to 14 mph. The sky remains clear overhead.

Forecast for Today and Tomorrow

The National Weather Service forecasts sunny skies for today, with a high near 100F. During these peak hours, heat index values are expected to reach as high as 108. Winds will continue from the south southwest at 5 to 10 mph.

Overnight tonight, conditions will become mostly clear. Temperatures will drop to a low around 81F but will rise slightly to approximately 83F during the night. The heat index will remain elevated, peaking near 107.

Winds will shift to the south at 5 to 10 mph.

Tomorrow brings even more intense heat. Expect sunny skies with a high near 103F. Heat index values could climb as high as 111, creating extreme heat stress risks.

Winds will come from the southwest around 10 mph. Tonight tomorrow, skies will turn partly cloudy with a low around 81F, rising to about 83F overnight. The heat index will stay high at 107, with southwest winds of 5 to 10 mph.

Safety Reminders

Given the active Heat Advisory and extreme heat index values, it is critical to prioritize safety. Stay hydrated by drinking water frequently, even if you do not feel thirsty. Limit outdoor exertion, especially during the midday and afternoon hours when temperatures are highest.

Check on elderly neighbors or those without air conditioning to ensure their well-being. If you must be outside, seek shade and wear lightweight, light-colored clothing.

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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