July 13 is one of the hottest days of the year in the US.
On July 13, 1954 the average maximum temperature across the US was 95F (35C.) Kansas was 120F. Arkansas, Oklahoma, Missouri and Texas were over 110F. Twenty-nine states were over 100F and forty-four states were over 90F.
On July 13, 1936 the average maximum temperature across the US was 94F (34C.) California, Illinois, Indiana, Kentucky, Iowa, Missouri, Wisconsin and Minnesota were over 110F. Thirty states were over 100F and forty-two states were over 90F.
14 Jul 1954, Page 8 – The Waco News-Tribune at Newspapers.com
14 Jul 1936, 16 – Fort Worth Star-Telegram at Newspapers.com
14 Jul 1936, Page 1 – Statesville Daily Record at Newspapers.com