Weather chats with Mark Seeley

June ends with record high heat and humidity

Storm clouds are visible above a freeway
Storm clouds are visible above Interstate 35 near Owatonna, Minn., on Tuesday morning, June 30, 2026.
Minnesota Department of Transportation

The end of June saw the beginning of a heat wave with Monday bringing the warmest day of summer so far.

Afternoon Heat Index Values ranged from 100 to 112 degrees Fahrenheit at the most in some areas. That high index was driven by record high dew points.

“In my 48 years of monitoring the weather and reporting on it in Minnesota, I don't think I've ever seen a June day like June 29 of this year,” climatologist and meteorologist Mark Seeley said.

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