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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 Advisory in Effect as Temperatures Soar Near 102 Degrees - Jul 26, 4 AM

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

A Heat Advisory is active for McKinney, TX, with highs near 101F today and 102F tomorrow. Current conditions are hot and humid, with a heat index reaching 109F.

Cody Esparza

July 26, 20262 min read

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

*As of Jul 26, 4 AM local time.*

Current Conditions and Alert Status

A Heat Advisory is currently in effect for McKinney, Texas, signaling dangerous heat levels that require caution. The National Weather Service has issued this moderate-severity alert to warn residents of the extreme temperatures expected to persist through the coming days.

As of this Sunday overnight, the air temperature stands at 81F, but the combination of heat and moisture makes it feel significantly warmer, with a feels-like temperature of 84F. Humidity levels are substantial, with the relative humidity at 70% and a dew point of 70F, contributing to a muggy atmosphere.

Winds are light, blowing at 6 mph with gusts reaching 13 mph, under a clear sky.

Forecast for Today and Tomorrow

Today will be sunny with a high near 101F. The heat index is expected to climb as high as 109F, making it feel even hotter than the actual air temperature. There is a 0% chance of precipitation, ensuring dry conditions throughout the day.

Overnight, skies will remain mostly clear. Temperatures will drop to a low around 80F, though they may rise slightly to around 82F later in the night. Winds will shift to a south southwest direction at around 10 mph.

Tomorrow continues the trend of intense heat. Expect another sunny day with a high near 102F. The heat index could reach as high as 110F, posing significant risks for heat-related illnesses.

Like today, there is no rain expected, with precipitation chances at 0%. Winds will remain light, from the south southwest at 5 to 10 mph. Overnight into tomorrow night, skies will clear, with a low around 81F and temperatures rising to around 83F later in the night.

Winds will be from the south around 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 hours when the sun is strongest.

Seek air-conditioned environments as much as possible. Check on elderly neighbors and those who may be vulnerable to heat stress. Never leave people or pets in parked vehicles, as temperatures inside can rise rapidly to life-threatening levels.

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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