Prior to 40 years ago, 90 degree temperatures were common in Iowa on May 22, including 101 degrees at Logan, Iowa on May 22, 1925.  Every location in Iowa was over 90 degrees that day. There haven’t been any 90 degree temperatures in Iowa on May 22 in over 40 years.

It was even hotter in Illinois on May 22, 1925 – when Danville reached 103 degrees.