1901-2000 Degrees Fahrenheit 1 62.9 57.6 5.3 122 7 1951 1988 1899 1900 top-tenth 2 57.6 53.1 4.5 125 4 1917 1988 1899 1900 top-tenth 3 51.9 48.3 3.6 123 6 1917 1988 1899 1900 top-tenth 1992,1994 4 47.1 43.5 3.6 120 9 1917 2012 1899 1900 top-tenth 1986 5 41.5 39.2 2.3 107 22 1917 1934 1899 1900 top-third 6 38.5 35.8 2.7 115 14 1917 1934 1899 1900 top-third 7 35.5 33.6 1.9 103 25 1917 1934 1899 1900 top-third 1926,1999 8 35.2 33.1 2.1 110 18 1917 1934 1899 1900 top-third 1988,1999 9 35.6 34.1 1.5 103 25 1917 1934 1899 1900 top-third 1911,1990,2003 10 37.5 36.1 1.4 102 26 1917 1934 1899 1900 top-third 1911,1990,2009 11 39.7 38.5 1.2 98 30 1917 1934 1899 1900 top-third 1977 12 41.8 40.8 1.0 95 33 1917 1934 1899 1900 top-third 1935 18 38.5 39.1 -0.6 32 96 1917 2016 1899 1900 bottom-third 1907,1925,1969,1975,1985 24 39.7 40.7 -1.0 14 113 1917 2016 1899 1900 bottom-third 36 39.8 40.7 -0.9 12 114 1917 2017 1899 1900 bottom-tenth 1905,1915,1922,1931,1973 48 39.7 40.7 -1.0 8 117 1899 2018 1899 1900 bottom-tenth 1914,1916 60 39.6 40.7 -1.1 5 119 1917 2016 1900 1900 bottom-tenth