1901-2000 Degrees Fahrenheit 1 59.1 56.3 2.8 93 37 1915 1907 1896 1897 top-third 2 55.2 52.9 2.3 94 36 1960 2017 1896 1897 top-third 3 50.4 50.4 0.0 61 69 1978 2017 1896 1897 normal 1975,1981,2002 4 49.9 49.6 0.3 65 64 1915 1907 1896 1897 normal 1946,1993,2003 5 50.7 50.6 0.1 61 68 1899,1912 2017 1896 1897 normal 1939 6 52.8 53.2 -0.4 50 79 1899,1977 2017 1896 1897 normal 7 56.0 56.4 -0.4 47 82 1977 2017 1896 1897 normal 1961,1980,1985 8 59.4 59.6 -0.2 52 77 1977 2017 1896 1897 normal 1966 9 61.9 62.1 -0.2 52 77 1977 2017 1896 1897 normal 1943,2003 10 63.9 63.9 0.0 61 68 1977 2017 1896 1897 normal 1963,1994 11 65.1 64.6 0.5 81 48 1977 2017 1896 1897 normal 1900,1921 12 65.3 64.6 0.7 93 36 1977 2012 1896 1897 top-third 1956,2005 18 60.5 60.8 -0.3 38 90 1913 2017 1897 1897 bottom-third 1965,1968,1976 24 64.2 64.6 -0.4 27 101 1978 2013 1897 1897 bottom-third 1916,1931,1943,1963,1968,1976,1989 36 -99 64.6 -99 -99 -99 1977 2013 normal 48 -99 64.6 -99 -99 -99 1915 2019 normal 60 -99 64.6 -99 -99 -99 1962,1977 2020 normal