1901-2000 Degrees Fahrenheit 1 51.7 53.9 -2.2 34 95 1976 1985 1959 1966 bottom-third 1941 2 56.6 59.2 -2.6 11 118 1976 1919 1952 1966 bottom-tenth 3 61.0 64.5 -3.5 4 125 1976 1931 1952 1966 bottom-tenth 4 64.8 68.4 -3.6 2 127 1976 2016 1967 1966 bottom-tenth 5 67.3 70.9 -3.6 2 127 1976 2016 1967 1966 bottom-tenth 6 69.1 72.1 -3.0 2 127 1976 2016 1967 1966 bottom-tenth 7 69.1 72.0 -2.9 2 127 1976 1998 1967 1966 bottom-tenth 8 69.1 71.0 -1.9 4 125 1976 1998,2016 1961 1966 bottom-tenth 9 68.0 69.2 -1.2 10 119 1976 2016 1961 1966 bottom-tenth 1993,2013 10 65.6 67.2 -1.6 3 126 1968,1976 2016 1940 1966 bottom-tenth 1917,1940 11 63.7 65.2 -1.5 10 119 1940 1927 1966 1966 bottom-tenth 1912,1961,1966,1970 12 62.3 63.6 -1.3 11 117 1940 2016 1964 1966 bottom-tenth 1958,1964 18 65.2 66.5 -1.3 5 123 1968 2016,2017 1958 1966 bottom-tenth 1940,1958,1970,1984 24 62.3 63.6 -1.3 6 121 1979 2017 1961 1966 bottom-tenth 36 62.8 63.6 -0.8 13 113 1969,1970 2017,2018 1962 1966 bottom-tenth 1962,1976 48 62.7 63.6 -0.9 10 115 1970,1979 2018,2019 1961 1966 bottom-tenth 60 62.8 63.6 -0.8 12 112 1970 2020 1964 1966 bottom-tenth 1964,1983,1984