1901-2000 Degrees Fahrenheit 1 45.5 42.6 2.9 101 29 2018 1915 1989 1987 top-third 2 39.4 35.5 3.9 111 19 1950 2012 1989 1987 top-third 1938,1991 3 33.1 29.1 4.0 111 19 1936 2012 1989 1987 top-third 1910 4 30.8 25.0 5.8 124 6 1912 2012 1989 1987 top-tenth 5 26.4 23.6 2.8 105 24 1904 2012 1989 1987 top-third 1954 6 26.7 24.9 1.8 97 32 1904 2012 1989 1987 top-third 1945,1946 7 29.7 28.1 1.6 98 31 1904 2012 1989 1987 top-third 1981 8 33.1 31.8 1.3 96 33 1904 2012 1989 1987 top-third 1949,1961,1985,1992 9 36.9 35.7 1.2 93 36 1904 2012 1989 1987 top-third 1915 10 40.2 39.0 1.2 97 32 1904 2012 1989 1987 top-third 1938,1945,1992 11 42.3 41.3 1.0 91 38 1904 2012 1989 1987 top-third 1910,1938,2003 12 43.3 42.4 0.9 88 41 1904 2012 1986 1989 top-third 1902,1922,1949,1985 18 37.2 36.5 0.7 83 45 1918 2017 1986 1989 normal 1939 24 43.4 42.4 1.0 98 30 1918 2017 1987 1989 top-third 1915,1945,1991 36 43.4 42.3 1.1 100 27 1918 2000 1988 1989 top-third 1988,1991,2009 48 43.8 42.3 1.5 107 19 1918 2002 1989 1934 top-third 2017 60 43.4 42.3 1.1 96 29 1920 2002 1989 1989 top-third 1934,1989,2015