Avg
Min
Max
Range
January 7.55 -6.0 24.5 30.5
February 7.86 -9.3 24.5 33.8
March 8.42 -11.5 24.5 36.0
April 13.51 1.6 24.5 22.9
May 17.33 7.8 27.1 19.3
June 19.20 8.2 33.8 25.6
July 19.18 8.2 34.1 25.9
August 14.66 8.2 34.7 26.5
September 14.67 8.2 32.6 24.4
October 14.01 2.7 29.9 27.2
November 9.47 1.3 17.8 16.5
December 6.24 -3.6 17.7 21.3