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5-day forecast / McKinney, TX

SundayChance Showers And Thunderstorms95° / 71° 28%
MondayChance Rain Showers then Slight Chance Showers And Thunderstorms93° / 73° 25%
TuesdayMostly Sunny96° / 73° 11%
WednesdayShowers And Thunderstorms Likely91° / 72° 56%
ThursdayShowers And Thunderstorms85° / 68° 80%

McKinney Weather: Heat and Air Quality Alert - Sep 27, 2 PM

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

McKinney residents face high heat and an active Air Quality Alert today. Expect scattered storms and highs near 95 degrees, with similar conditions continuing tomorrow.

Cody Esparza

September 27, 20262 min read

National Weather Service radar for North Texas (KFWS)

*As of Sep 27, 2 PM local time.*

Current Conditions and Air Quality

An active Air Quality Alert is currently in effect for the McKinney area, issued by the National Weather Service. While the specific severity level is not detailed in the current data, residents should remain aware of potential impacts on outdoor air quality. Currently, it is Sunday afternoon with clear skies.

The air temperature stands at 91 degrees Fahrenheit, though the heat index makes it feel like 94 degrees. Relative humidity is at 44 percent, and the dew point is 66 degrees. Winds are blowing from the south southeast at 13 miles per hour, with gusts recorded at 11 miles per hour.

Today and Tonight Outlook

Today’s forecast indicates a high near 95 degrees, with heat index values potentially reaching 100 degrees. Scattered showers and thunderstorms are possible, with a 28 percent chance of precipitation. The sky will remain mostly sunny.

Tonight, conditions will shift to mostly cloudy skies with a low around 71 degrees. A chance of showers and thunderstorms persists, with a 30 percent probability of rain. New rainfall amounts are expected to be less than a tenth of an inch.

Winds will ease to around 5 miles per hour from the southeast.

Tomorrow’s Forecast

Tomorrow will bring a high near 93 degrees, with heat index values as high as 99 degrees. The sky will be mostly sunny, and there is a 25 percent chance of showers and thunderstorms. Winds will range from 5 to 10 miles per hour from the southeast.

Rainfall totals are again expected to be minimal, under a tenth of an inch. Given the sustained high temperatures and heat index values, it is advisable to stay hydrated and limit strenuous outdoor activities during the hottest parts of the day. Monitor local updates for any changes in air quality conditions.

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

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

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