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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%

Heat Advisory in Effect for McKinney as Temperatures Climb Near 100 - Jul 24, 4 AM

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

A Heat Advisory is active for McKinney, TX, with highs near 99F and oppressive humidity. Residents are urged to stay cool and hydrated during the peak heat.

Cody Esparza

July 24, 20262 min read

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

*As of Jul 24, 4 AM local time.*

Current Conditions and Alert Status

A Heat Advisory is currently in effect for McKinney, Texas, signaling moderate severity and expected urgency. The National Weather Service has issued this alert to warn of dangerously hot conditions. As of Friday overnight, the air temperature stands at 81F, with a feels-like temperature of 86F.

Humidity levels are high, with relative humidity at 84% and a dew point of 75F, creating an oppressively humid atmosphere. Winds are blowing at 10 mph with gusts reaching 20 mph, under a mostly cloudy sky.

Forecast for Today and Tomorrow

Today, conditions will shift to partly sunny skies with a high near 97F. The low will drop to around 79F. There is a minimal chance of precipitation at 6%. The National Weather Service notes that heat index values could reach as high as 107, driven by south southeast winds of 10 to 15 mph.

Tonight, the sky will become mostly clear, allowing temperatures to settle around 79F. Southeast winds will ease to 5 to 10 mph. However, as the night progresses, conditions will turn partly cloudy with a low around 80F. Temperatures may rise to around 82F overnight, with heat index values peaking at 106. South winds will continue at 10 to 15 mph.

Tomorrow, the heat will intensify further with mostly sunny skies and a high near 99F. The low will be around 80F. Precipitation chances drop to just 1%.

Heat index values are expected to climb as high as 107 again. Winds will shift to the south southwest at around 10 mph. Tomorrow night will bring mostly clear skies with a low around 80F, rising to 82F overnight, with south winds of 5 to 10 mph.

Safety Reminders

Given the active Heat Advisory and oppressive humidity, it is critical to prioritize safety. Stay hydrated by drinking plenty of water throughout the day. Limit outdoor exertion, especially during the midday hours when temperatures are highest.

Check on elderly neighbors and those without air conditioning. If you must be outside, seek shade and wear lightweight, light-colored clothing to help manage the heat index values that exceed 100 degrees.

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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