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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 102F - Jul 27, 8 AM

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

A Heat Advisory is active for McKinney, TX, with highs near 102F and heat index values up to 109F. Current conditions are hot and humid.

Cody Esparza

July 27, 20262 min read

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

*As of Jul 27, 8 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 due to the combination of high temperatures and humidity. As of this morning, the air temperature stands at 84F, but the heat index makes it feel like 88F.

The atmosphere is quite humid, with a dew point of 70F and relative humidity at 62%. Winds are blowing from the south southwest at 8 mph, with gusts reaching up to 20 mph. The sky remains clear overhead.

Forecast for Today and Tomorrow

Today will be intensely sunny with a high near 102F. The heat index is expected to climb as high as 109F, creating hazardous conditions for prolonged outdoor activity. There is no chance of precipitation, and skies will remain clear.

Overnight, conditions will be mostly clear with a low around 80F. Temperatures will rise to around 82F during the night, keeping the heat index as high as 106F. Winds will shift to the south at 5 to 10 mph.

Tomorrow mirrors today’s intensity. Expect another sunny day with a high near 102F. The heat index will reach up to 106F.

Precipitation chances remain at zero percent. As tomorrow night approaches, skies will turn mostly clear with a low around 81F. Temperatures may rise to around 83F overnight, with heat index values peaking at 104F.

Winds will continue from the south at 5 to 10 mph.

Safety Reminders

Given the active Heat Advisory and extreme heat index values, it is critical to stay hydrated and limit midday exertion. Seek air-conditioned environments during the peak heat hours. Check on elderly neighbors and vulnerable individuals who may be at higher risk.

Wear lightweight, light-colored clothing if you must be outside, and never leave people or pets in parked vehicles. Monitor local updates as conditions remain severe through the advisory period.

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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