1901-2000 Degrees Fahrenheit 1 70.3 71.8 -1.5 29 101 1976 1896 1983 1982 bottom-third 1932,2020 2 66.5 67.9 -1.4 20 110 1997 1896 1983 1982 bottom-third 1910,1919,1990 3 62.9 64.2 -1.3 24 106 1931 2012 1983 1982 bottom-third 1968 4 59.7 60.6 -0.9 37 93 1901 2012 1983 1982 bottom-third 1913,1916,1917,1937 5 56.1 57.8 -1.7 22 108 1940 2012 1983 1982 bottom-third 1914 6 54.0 56.2 -2.2 8 121 1978 2012 1978 1983 bottom-tenth 1906,1960,1970 7 54.0 56.0 -2.0 13 116 1940 2017 1978 1983 bottom-tenth 1899,1912,1926 8 55.4 57.1 -1.7 14 115 1977 2017 1981 1983 bottom-third 1960,1981 9 57.4 59.2 -1.8 11 118 1977 2017 1978 1983 bottom-tenth 1899,2010 10 59.9 61.3 -1.4 14 115 1977 2017 1980 1983 bottom-third 1980 11 61.8 63.0 -1.2 16 113 1977 2017 1980 1983 bottom-third 1924,1964,1971 12 63.0 64.3 -1.3 10 119 1977 2017 1980 1983 bottom-tenth 1924,1931,1971,1980,2010 18 60.2 61.6 -1.4 10 118 1977 2017 1980 1983 bottom-tenth 24 63.3 64.3 -1.0 8 120 1978 2017 1978 1983 bottom-tenth 36 63.5 64.3 -0.8 10 117 1970 2019 1980 1983 bottom-tenth 48 63.6 64.3 -0.7 11 115 1971 2020 1983 1983 bottom-tenth 1983 60 63.5 64.3 -0.8 8 117 1971 2020 1981 1983 bottom-tenth 1968,1973,1978