Daily Archives: September 20, 2019

Carlinville, Illinois was over 90 degrees on twenty-two days during September, 1897.  The peak temperature that month was 101 degrees, and the average maximum was 92 degrees.

Prior to 1955, Owosso, Michigan averaged about seventeen days per year over 90F (32C.) Now they average less than five days over 90 degrees. Peak temperatures at Owosso are declining at a rate of about five degrees per century. Summer … Continue reading →

During September 1930, Purcellville, Virginia had twenty-two days over 90 degrees, three days over 100 degrees, and averaged 94 degrees from September 1 to September 27. This came shortly after the all-time record heatwave of August, 1930 when they had … Continue reading →