From June 24 to July 28, 1936 Nebraska afternoon temperatures averaged over 90F every day. Over that 35 day period the state averaged 102F, peaking at 111F on July 25, 1936.
The minimum temperature at Lincoln, Nebraska on July 25, 1936 was 91F, which may have been the hottest night ever recorded in the US outside of the desert Southwest.
Extreme Weather – Google Books
July, 1936 was the hottest month on record in the US.