The Midwest hardly ever reaches 100 degrees anymore, but from May 28 to August 19, 1934 the Midwest recorded temperatures over 100 degrees on seventy-two of eighty-three days. Here is an animation of the May 28 to June 3, 1934 heatwave.
Midwest summer temperatures have become much less extreme over the past century. The average daily temperature range of temperature has dropped about three degrees.
