1901-2000 Degrees Fahrenheit 1 29.4 28.3 1.1 76 53 1899 2012 1917 1918 normal 2 23.9 22.4 1.5 81 48 1899 2012 1917 1918 normal 1907,1986 3 22.5 19.0 3.5 105 24 1912 2012 1918 1898 top-third 4 23.4 18.9 4.5 112 16 1899 2012 1918 1919 top-third 5 25.8 21.4 4.4 113 15 1912 2012 1918 1919 top-third 6 29.5 25.6 3.9 113 15 1912 2012 1918 1919 top-third 7 32.7 30.3 2.4 106 22 1912 2012 1918 1919 top-third 1964,2004 8 37.1 34.8 2.3 106 22 1912 2012 1918 1919 top-third 2005 9 40.4 38.6 1.8 106 22 1904,1912 2012 1918 1919 top-third 1964,2005 10 42.7 41.1 1.6 103 25 1904 2012 1918 1919 top-third 11 44.0 42.4 1.6 105 23 1904 2012 1918 1919 top-third 1945,2004 12 43.7 42.4 1.3 100 28 1918 2012 1918 1919 top-third 1989,2010 18 36.4 36.8 -0.4 38 89 1918 2017 1918 1915 bottom-third 1897,1921,1944 24 41.3 42.4 -1.1 19 108 1918 2017 1918 1916 bottom-third 1978,1979 36 40.9 42.3 -1.4 4 122 1918 2000 1918 1917 bottom-tenth 1929 48 40.9 42.3 -1.4 3 122 1918 2002 1918 1917 bottom-tenth 1906 60 41.3 42.3 -1.0 6 118 1920,1929 2002 1918 1917 bottom-tenth