I’m flying into Detroit, where the temperature is a cool 75 degrees. But June 16 wasn’t always a cool day in the US. In 1913, temperatures were over 100 degrees in parts of Michigan, and almost the entire eastern half of the US was over 90 degrees.
On this date in 1952, the extent of the heat was similar but a lot more 100 degree temperatures.
June 16 used to be a hot day in the US prior to 1960, but temperatures over the last 55 years have been much cooler.