1901-2000 Degrees Fahrenheit 1 75.3 75.7 -0.4 51 78 1903 1914 1959 1958 normal 1929,1985 2 70.3 72.0 -1.7 23 106 1976 1899 1954 1959 bottom-third 1945,2020 3 67.4 67.9 -0.5 37 92 1907 1896 1951 1959 bottom-third 1950,1951,1988 4 60.2 63.8 -3.6 1 128 1960 2012 1960 1959 lowest 5 55.8 59.7 -3.9 1 128 1960 2012 1960 1959 lowest 6 53.3 56.5 -3.2 4 125 1978 2012 1958 1959 bottom-tenth 7 51.9 54.4 -2.5 3 125 1978 2012 1958 1959 bottom-tenth 1958 8 51.3 53.9 -2.6 3 125 1940 2012 1940 1959 bottom-tenth 9 52.6 54.7 -2.1 5 123 1978 2017 1958 1959 bottom-tenth 10 54.6 56.4 -1.8 6 122 1977,1978 2017 1958 1959 bottom-tenth 1902,1969,1970 11 56.8 58.4 -1.6 9 119 1977 2017 1958 1959 bottom-tenth 1969,1980 12 58.6 60.1 -1.5 9 119 1968 2017 1958 1959 bottom-tenth 1970 18 57.7 58.9 -1.2 15 113 1977,1979 1922 1959 1958 bottom-third 24 59.0 60.1 -1.1 13 114 1978 2017 1959 1958 bottom-tenth 1984 36 58.7 60.1 -1.4 6 120 1970 2018 1960 1959 bottom-tenth 1977 48 59.4 60.1 -0.7 18 107 1980 2019,2020 1905 1959 bottom-third 1905,1965,1966 60 59.6 60.1 -0.5 25 99 1980 2020 1919 1959 bottom-third 1919,1986