1901-2000 Degrees Fahrenheit 1 63.4 65.1 -1.7 32 98 1983,1993 1896 1962 1970 bottom-third 1910,1918 2 58.3 61.6 -3.3 9 121 1983 1908,2020 1960 1970 bottom-tenth 3 55.2 58.3 -3.1 12 118 2010 1945 1968 1970 bottom-tenth 1942 4 53.6 55.9 -2.3 21 109 1978 2020,2023 1970 1967 bottom-third 1924,1941 5 53.4 54.7 -1.3 35 94 1978 2020 1970 1967 bottom-third 1941 6 52.9 55.0 -2.1 16 113 1977 1932 1970 1967 bottom-third 1963 7 54.7 56.6 -1.9 15 114 1977 1932 1970 1967 bottom-third 1915 8 57.7 59.0 -1.3 22 107 1977 1932 1970 1967 bottom-third 1902,1963 9 60.2 61.4 -1.2 22 107 1977 1932 1970 1967 bottom-third 1981 10 62.2 63.4 -1.2 19 110 1977 1932 1970 1967 bottom-third 1988 11 63.6 64.8 -1.2 20 109 1977 1932 1970 1967 bottom-third 12 64.4 65.4 -1.0 19 110 1977 1932 1970 1967 bottom-third 1941,1960,1988 18 60.1 61.9 -1.8 5 123 1978 2017 1970 1968 bottom-tenth 1941,1964 24 64.0 65.4 -1.4 6 122 1978 2020 1970 1967 bottom-tenth 1941 36 63.8 65.4 -1.6 5 122 1970 2021 1970 1968 bottom-tenth 1977 48 63.5 65.4 -1.9 1 125 1971 2022 1971 1970 lowest 60 63.8 65.4 -1.6 1 124 1970,1971,1981 2023 1970 1970 lowest 1970,1981