On this date in 1939, most of the US was over 60 degrees, and the glaciers of Greenland and Norway were facing “catastrophic collapse.” Temperatures were over 60 degrees in Minnesota, and over 70 degrees in Nebraska.
17 Dec 1939, Page 15 – Harrisburg Sunday Courier at Newspapers.com
Temperatures were 25 degrees warmer than last year, which climate experts say was the hottest year in the history of the planet.