1901-2000 Degrees Fahrenheit 1 64.2 68.2 -4.0 4 125 1954 1902 1954 1970 bottom-tenth 1917 2 61.7 64.2 -2.5 7 122 1983 1896 1961 1970 bottom-tenth 1928,1976,1993 3 56.6 60.2 -3.6 2 127 1960 2012 1960 1970 bottom-tenth 4 53.1 56.5 -3.4 2 127 1947 2012 1960 1970 bottom-tenth 1960 5 50.9 53.6 -2.7 7 122 1940,1978 2012 1969 1970 bottom-tenth 1895,1960,1969 6 50.1 51.9 -1.8 15 113 1978 2012 1970 1967 bottom-third 1961,1984 7 49.7 51.8 -2.1 11 117 1940 2012,2017 1970 1967 bottom-tenth 8 51.2 53.0 -1.8 12 116 1977 2017 1970 1967 bottom-tenth 9 53.9 55.1 -1.2 19 109 1977 2017 1970 1967 bottom-third 1899,1960,1961,1963 10 56.2 57.3 -1.1 20 108 1977 2017 1970 1967 bottom-third 1915,1961,1963,1993 11 58.2 59.1 -0.9 21 107 1968 2017 1970 1967 bottom-third 1960,1961,1963,1983,1993,2014 12 59.4 60.5 -1.1 17 111 1968 2017 1970 1967 bottom-third 1918,1983,1996 18 56.2 57.6 -1.4 12 115 1969,1970,1977 2017 1970 1967 bottom-tenth 1902 24 59.2 60.5 -1.3 8 119 1969 2017 1970 1967 bottom-tenth 36 58.9 60.5 -1.6 5 121 1970 2018 1970 1968 bottom-tenth 1968 48 58.6 60.5 -1.9 1 124 1971 2019,2020 1971 1970 lowest 60 58.9 60.5 -1.6 2 122 1970 2020 1970 1969 bottom-tenth