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5-day forecast / McKinney, TX

MondayMostly Sunny80° / 60° 1%
TuesdayMostly Sunny82° / 61° 1%
WednesdayMostly Sunny82° / 64° 6%
ThursdayMostly Sunny82° / 63° 13%
FridayChance Rain Showers75° / 62° 40%

McKinney Heat Advisory: Dangerous Heat Index Values Expected Through Tomorrow - Sep 8, 2 PM

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

A Heat Advisory is active for McKinney as air temperatures reach 97F and heat index values climb to 106F. Sunny skies and low precipitation chances persist through tomorrow.

Cody Esparza· AI-assisted, edited by Jake Team

September 8, 20262 min read

National Weather Service radar for North Texas (KFWS)

*As of Sep 8, 2 PM local time.*

Dangerous Heat Conditions

A Heat Advisory is currently active for the McKinney area, signaling dangerous heat conditions that residents should take seriously. It is currently Tuesday this afternoon, and the air temperature stands at 97F. However, the perceived temperature is significantly higher, with a feels-like value of 104F.

This intense heat is driven by a dew point of 70F and relative humidity at 42%. The sky is clear, and winds are blowing from the south southeast at 11 mph, with gusts reaching 17 mph. These conditions create a hazardous environment for outdoor activities, particularly during the peak heat hours.

Today and Tonight Outlook

The forecast for today indicates sunny skies with a high near 101F. The heat index values are expected to reach as high as 106F, making the air feel even more oppressive than the actual temperature. The chance of precipitation is low, at only 7%, meaning rain is not a factor in the immediate forecast.

As night falls, conditions will remain mostly clear. Temperatures will drop to a low near 79F, though they may rise slightly to around 81F overnight. The heat index will remain elevated, reaching values as high as 104F.

Winds will ease to 5 to 10 mph from the south southeast, providing some slight relief from the daytime gusts.

Tomorrow's Forecast

Tomorrow will bring similar conditions, with sunny skies and a high near 100F. The heat index values are projected to climb to 107F, indicating continued dangerous heat levels. The chance of precipitation remains minimal at 5%.

Winds will continue to blow from the south southeast at 5 to 10 mph. As the day progresses into the evening, skies will remain clear, and temperatures will fall to a low near 78F, potentially rising to 80F overnight. The heat index will stay high, reaching 104F.

Given the sustained high heat index values and the active Heat Advisory, it is crucial to stay hydrated and limit midday exertion. Check on neighbors and ensure that anyone without access to air conditioning is safe and comfortable during this period of extreme heat.

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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