1901-2000 Degrees Fahrenheit 1 45.2 48.0 -2.8 31 99 1895 2018 1973 1976 bottom-third 2 39.3 46.6 -7.3 5 125 1978 1950 1958 1976 bottom-tenth 3 40.2 46.6 -6.4 2 127 1978 1932 1977 1976 bottom-tenth 4 41.6 48.3 -6.7 1 128 1977 1932 1977 1976 lowest 5 44.9 51.4 -6.5 1 128 1977 1932 1977 1976 lowest 6 49.4 55.3 -5.9 1 128 1977 1932 1977 1976 lowest 7 53.4 58.7 -5.3 1 128 1977 1932 1977 1976 lowest 8 56.5 61.4 -4.9 1 128 1977 1932 1977 1976 lowest 9 58.5 63.2 -4.7 1 128 1977 1932 1977 1976 lowest 10 59.2 63.9 -4.7 1 128 1977 2017 1977 1976 lowest 11 59.5 63.8 -4.3 1 128 1977 2017 1977 1976 lowest 12 59.4 63.1 -3.7 1 128 1977 2017 1977 1976 lowest 18 57.8 60.5 -2.7 1 127 1977 2017 1977 1976 lowest 24 60.9 63.1 -2.2 2 126 1978 2017 1977 1976 bottom-tenth 36 61.5 63.1 -1.6 4 123 1970 2018 1970 1976 bottom-tenth 48 62.2 63.1 -0.9 11 115 1970 2019,2020 1972 1976 bottom-tenth 1905,1968,1981,1984 60 62.2 63.1 -0.9 10 115 1970 2020 1973 1976 bottom-tenth 1962,1963,1965,1967,1968,1978,1982,1984,1985