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5-day forecast / McKinney, TX

WednesdaySunny83° / 65° 7%
ThursdayPartly Sunny83° / 65° 2%
FridaySlight Chance Rain Showers75° / 60° 23%
SaturdayChance Showers And Thunderstorms77° / 59° 48%
SundayPartly Sunny80° / 63° 8%

Heat Advisory in Effect for McKinney as Temperatures Climb Near 100 - Jul 24, 12 PM

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

McKinney residents face oppressive heat and humidity under an active Heat Advisory. Highs near 99F with heat indices up to 107F expected through tomorrow.

Cody Esparza· AI-assisted, edited by Jake Team

July 24, 20262 min read

National Weather Service radar for North Texas (KFWS)

*As of Jul 24, 12 PM local time.*

Current Conditions and Alert Status

A Heat Advisory is currently in effect for McKinney, Texas, signaling dangerous levels of heat and humidity. The National Weather Service has issued this moderate-severity alert due to the combination of rising temperatures and high moisture content in the air. Right now, the air temperature stands at 84F, but the oppressive humidity makes it feel like 92F.

The relative humidity is at 74%, with a dew point of 75F, creating a muggy atmosphere that feels particularly heavy. Winds are blowing from the south at 9 mph, with gusts reaching up to 15 mph, while the sky remains cloudy.

Today and Tonight Forecast

Today, the heat will intensify significantly. Highs are expected to reach near 97F, with heat index values climbing as high as 107F. There is a slight chance of rain showers before 4pm, though the overall chance of precipitation is only 3%.

South winds will continue at 10 to 15 mph. As evening approaches, skies will become partly cloudy. Lows will settle near 80F, though temperatures may rise to around 82F overnight.

The heat index will remain elevated at up to 106F. Residents should remain cautious as the humidity persists through the night.

Tomorrow Outlook

Conditions will remain hot and sunny tomorrow. The sky will be mostly sunny with a high near 99F. Heat index values are forecast to reach 107F, making it feel even hotter than the actual air temperature.

The chance of precipitation drops to just 1%. South southwest winds will slow to around 10 mph. Overnight, skies will clear to mostly clear, with lows around 80F and temperatures rising to 82F.

The heat index will decrease slightly to 105F, with south winds dropping to 5 to 10 mph.

Safety Reminder

Given the active Heat Advisory and oppressive humidity, it is critical to stay hydrated and limit outdoor exertion during the hottest parts of the day. Check on elderly neighbors and ensure pets have access to cool water and shade. Avoid prolonged exposure to the sun, and seek air-conditioned environments when possible to prevent heat-related illnesses.

National Weather Service radar for North Texas (KFWS)

Sources

National Weather Service radar

National Weather Service forecast data

Open-Meteo weather data

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Cody Esparza· AI-assisted, edited by Jake Team

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

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