1901-2000 Degrees Fahrenheit 1 79.0 78.6 0.4 68 61 1955 1914 1970 1968 normal 1968,2006 2 73.1 75.3 -2.2 8 121 1976 1902 1966 1970 bottom-tenth 3 69.5 71.7 -2.2 8 121 1961 1896 1961 1970 bottom-tenth 1928 4 65.0 68.0 -3.0 2 127 1983 1908 1971 1970 bottom-tenth 5 61.5 64.4 -2.9 2 127 1983 1927 1960 1970 bottom-tenth 1960 6 59.1 61.5 -2.4 9 120 1940 1927,2017 1970 1969 bottom-tenth 7 58.0 59.6 -1.6 16 112 1978 1927,2017 1970 1967 bottom-third 8 57.0 59.1 -2.1 9 119 1940 2017 1970 1968 bottom-tenth 1964 9 58.0 59.8 -1.8 10 118 1977 2017 1970 1967 bottom-tenth 1964,1981,2010 10 60.0 61.4 -1.4 14 114 1977 2017 1970 1967 bottom-third 1966 11 61.8 63.1 -1.3 14 114 1977 2017 1970 1967 bottom-third 1984 12 63.4 64.6 -1.2 14 114 1968,1977 2017 1970 1967 bottom-third 1951,1980 18 61.9 63.6 -1.7 7 121 1969 2017 1970 1967 bottom-tenth 1979,1980 24 62.8 64.6 -1.8 5 122 1969 2017 1970 1968 bottom-tenth 36 62.7 64.6 -1.9 2 124 1970 2018,2019 1970 1969 bottom-tenth 48 62.5 64.6 -2.1 1 124 1971 2020 1971 1970 lowest 60 62.8 64.6 -1.8 1 123 1970,1971 2020 1970 1970 lowest 1970