1901-2000 Degrees Fahrenheit 1 43.1 50.6 -7.5 6 124 1895 2023 1958 1967 bottom-tenth 2 44.1 49.2 -5.1 12 118 1978 1950 1963 1967 bottom-tenth 3 47.0 49.1 -2.1 31 98 1978 1932 1966 1967 bottom-third 4 48.6 50.8 -2.2 25 104 1977 1932 1964 1967 bottom-third 5 51.5 53.8 -2.3 17 112 1977 1932 1964 1967 bottom-third 1900,1969 6 54.6 57.5 -2.9 9 120 1977 1932 1964 1967 bottom-tenth 1905 7 57.8 60.7 -2.9 7 122 1977 1932 1918 1967 bottom-tenth 1978 8 60.2 63.1 -2.9 3 126 1977 1932 1902 1967 bottom-tenth 1899 9 62.0 64.9 -2.9 2 127 1977 1932 1968 1967 bottom-tenth 10 62.9 65.6 -2.7 2 127 1977 1932 1968 1967 bottom-tenth 11 63.5 65.5 -2.0 7 122 1977 2017 1940 1967 bottom-tenth 1940 12 63.3 64.8 -1.5 8 121 1977 2017 1940 1967 bottom-tenth 1899,1984 18 61.2 62.3 -1.1 13 115 1905,1978 2017 1964 1967 bottom-tenth 24 63.6 64.8 -1.2 8 120 1978 2017 1964 1967 bottom-tenth 1903,1964,2015 36 63.8 64.8 -1.0 11 116 1970 2018 1906 1967 bottom-tenth 48 64.0 64.8 -0.8 12 114 1905 2019 1966 1967 bottom-tenth 1903,1907,1963,1966,1972 60 64.0 64.8 -0.8 12 113 1905,1970 2020 1967 1967 bottom-tenth 1902,1964,1965,1967,1969