1901-2000 Degrees Fahrenheit 1 70.3 72.3 -2.0 32 97 1918 1925 1982 1983 bottom-third 1992,1995,2017 2 73.4 75.3 -1.9 19 110 1967 1925 1982 1983 bottom-third 1901,1918,1942,1966 3 74.5 76.5 -2.0 12 117 1967 1925 1976 1983 bottom-tenth 1989 4 74.8 76.3 -1.5 18 111 1967 1925 1982 1983 bottom-third 1996,1997 5 73.0 74.7 -1.7 11 118 1967 1925 1979 1983 bottom-tenth 1940,1975 6 70.5 72.2 -1.7 10 119 1976 1925 1976 1983 bottom-tenth 7 67.5 69.2 -1.7 8 121 1961 1921,1925 1976 1983 bottom-tenth 8 64.7 65.9 -1.2 17 112 1958,1960 1925 1983 1983 bottom-third 1950,1975,1983,1992 9 61.4 63.0 -1.6 11 118 1940 1921 1979 1983 bottom-tenth 1947,1985 10 58.8 60.9 -2.1 3 125 1940 1921,2012 1979 1983 bottom-tenth 1961,1979 11 58.0 59.9 -1.9 3 125 1940 2012,2016 1978 1983 bottom-tenth 1978 12 58.3 59.9 -1.6 7 121 1940 2016 1978 1983 bottom-tenth 1996 18 62.5 64.0 -1.5 4 124 1977 2017 1977 1983 bottom-tenth 1940 24 58.9 59.9 -1.0 11 116 1978,1979 2017 1979 1983 bottom-tenth 1905 36 59.0 59.9 -0.9 11 115 1979 2018 1981 1983 bottom-tenth 1963,1977,1981 48 59.0 59.9 -0.9 10 115 1961,1979 2019 1982 1983 bottom-tenth 1968,1982 60 59.1 59.9 -0.8 11 113 1971 2020 1983 1983 bottom-tenth 1961,1968,1972,1978,1983,1985