The frequency of 90 degree days in the US has been plummeting for 80 years, and is the lowest on record this summer.
Alarmists will try to complain that this trend is due to time of observation bias, but that argument is a non-starter. The graph below shows the identical pattern for stations which took morning or night readings on July 15, 1936 .... http://stevengoddard.wordpress.com
