US July 28 afternoon temperatures have dropped about five degrees since the 1930s.
On this date in 1930, nine states were over 110F – Arkansas 114, Kentucky 114, Indiana 113, Illinois 112, Missouri 112, Mississippi 111, Arizona 110, Oklahoma 110 and Tennessee 110.
On this date in 1931, every state was over 90 degrees.
The coolest July 28 was in 2013. The only states over 100F were California, Arizona and Texas.
