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Like in Wisconsin, summers used to be much hotter in Michigan, and last summer was the coolest on record.
In 1887, one day out of 10 in Michigan was above 90 degrees.
Last year also had the highest percentage of below 0F days in Michigan, with almost one day out of ten below 0F (-18C) . 2014 had the coolest summer and coldest winter on record in Michigan.
Duration of heatwaves gas also gotten much shorter. In 1921, OWOSSO WWTP reported 21 consecutive days over 90 degrees. This past summer, the longest stretch of ninety degree days was one.
During the heatwave of 1921, Owosso was over 90 degrees every day except one from June 17 to July 19. Heatwaves like this are inconceivable now.
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