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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%

Humid Start to Thursday Night in McKinney; Heat Builds Tomorrow - Jul 16, 4 AM

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

McKinney residents face high humidity with a dew point of 72F tonight. Temperatures will climb to near 91F tomorrow with a heat index up to 100F.

Cody Esparza

July 16, 20262 min read

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

*As of Jul 16, 4 AM local time.*

Current Conditions and Humidity

It is currently Thursday overnight in McKinney, TX, and the air feels heavy with moisture. The current air temperature sits at 75F, but the feels-like temperature is 77F due to the high humidity. The relative humidity is at 89%, with a dew point of 72F, indicating a very muggy atmosphere.

Winds are calm at 0 mph, though gusts may reach 9 mph. The sky is clear overhead, offering a quiet start to the night despite the sticky conditions.

Forecast for Today and Tonight

Today, the high will reach near 89F, with a low near 72F. There is a 31% chance of precipitation, with showers and thunderstorms possible. According to the National Weather Service, there is a slight chance of rain showers between 7am and 1pm, followed by a chance of showers and thunderstorms from 1pm to 4pm.

Partly sunny skies are expected with south winds of 5 to 10 mph.

Tonight, conditions will shift to a slight chance of rain showers before 4am. The sky will be mostly cloudy with a low around 72F. Temperatures may rise to around 74F overnight.

South winds will be around 5 mph, with a 20% chance of precipitation. Later in the night, there is a chance of showers and thunderstorms before 10pm. The sky will become partly cloudy, with a low around 74F and temperatures rising to around 76F.

South winds will increase to 5 to 10 mph, with a 30% chance of precipitation.

Tomorrow’s Heat and Safety

Tomorrow, the high will climb to near 91F, with a low near 76F. The chance of precipitation is 20%, with mostly sunny skies initially, followed by a slight chance of showers and thunderstorms after 1pm. Heat index values are expected to reach as high as 100F.

South winds will be 5 to 10 mph, with gusts as high as 20 mph. Tomorrow night will be partly cloudy with a low around 76F and a slight chance of showers and thunderstorms before 7pm.

With heat index values approaching 100F, it is crucial to stay hydrated and limit midday exertion. Check on neighbors and pets to ensure they remain cool and safe during the peak heat hours.

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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