On June 14, 1897 temperatures around Chicago were well over 100 degrees. It was 106 at Aurora, Illinois and 108 at Winamac, Indiana. Medford Wisconsin was 100 degrees. Today’s forecast is nearly 30 degrees cooler at Aurora.
The heatwave lasted for six days.
The hottest June 14 occurred in 1987, with a huge area of 90 and 100 degree temperatures from coast to coast. Milwaukee was 101.
June 14 afternoon temperatures have been declining since the 19th century, and there haven’t been any hot June 14ths in the last 25 years.