1901-2000 Degrees Fahrenheit 1 5.3 9.8 -4.5 34 96 1936 1998 2015 2017 bottom-third 1955 2 7.4 7.0 0.4 70 60 1936 1987 2014 2017 normal 1933,1980,2003,2008 3 9.1 8.3 0.8 71 58 1936 1998 2014 2017 normal 4 13.0 12.7 0.3 67 62 1936 2002 2014 2017 normal 1915 5 19.5 18.8 0.7 70 59 1936 2012 2014 2017 normal 6 26.0 24.9 1.1 75 54 1936 2016 2014 2017 normal 7 31.4 30.7 0.7 73 56 1936 2012,2016 2014 2017 normal 1939,2003 8 36.2 35.4 0.8 78 51 1936 2012 2015 2017 normal 1926,2011,2015 9 39.3 38.4 0.9 80 49 1936 2012,2016 2015 2017 normal 1908,1980 10 40.7 39.9 0.8 81 48 1936 2002 2015 2017 normal 11 40.8 39.9 0.9 83 46 1936 2002,2016 2015 2017 normal 1941 12 39.6 38.5 1.1 91 38 1936 2016 2015 2017 top-third 1939,1944,1990 18 36.7 34.0 2.7 115 13 1918 2017 2015 2017 top-tenth 24 41.4 38.5 2.9 120 8 1918 2017 2016 2017 top-tenth 2012 36 42.1 38.5 3.6 126 1 1918 2018 2017 2018 highest 48 41.2 38.4 2.8 124 2 1900,1918,1920 2002 2017 2002 top-tenth 2001 60 40.2 38.4 1.8 110 15 1920 2002 2015 2017 top-third 1935,2001,2013