1901-2000 Degrees Fahrenheit 1 65.2 68.2 -3.0 13 116 1976 1899 1954 1959 bottom-tenth 1989 2 63.4 64.1 -0.7 40 89 1907 1896 1951 1959 bottom-third 1909 3 55.1 59.8 -4.7 1 128 1960 2012 1960 1959 lowest 4 51.0 55.7 -4.7 1 128 1960 2012 1960 1959 lowest 5 48.8 52.6 -3.8 4 125 1978 2012 1958 1959 bottom-tenth 6 48.0 50.9 -2.9 4 124 1978 2012 1958 1959 bottom-tenth 7 47.9 50.7 -2.8 3 125 1940 2012,2017 1940 1959 bottom-tenth 8 49.8 52.0 -2.2 6 122 1978 2017 1958 1959 bottom-tenth 1968 9 52.3 54.3 -2.0 8 120 1977,1978 2017 1958 1959 bottom-tenth 10 54.9 56.7 -1.8 8 120 1977 2017 1958 1959 bottom-tenth 1918,1969,1970,1980 11 57.1 58.7 -1.6 11 117 1968,1977 2017 1958 1959 bottom-tenth 1902 12 58.5 60.1 -1.6 7 121 1977 2017 1958 1959 bottom-tenth 1904,1918,1940,1969,1993,2010 18 55.7 57.0 -1.3 14 113 1977 2017 1959 1958 bottom-third 1971 24 59.0 60.1 -1.1 15 112 1978 2017 1959 1958 bottom-third 1918,1964 36 58.7 60.1 -1.4 7 119 1970,1978,1979 2018,2019 1960 1959 bottom-tenth 48 59.4 60.1 -0.7 16 109 1980 2019 1905 1959 bottom-third 1905,1965,1966,1972,1977,1985 60 59.5 60.1 -0.6 21 103 1980 2020 1906 1959 bottom-third 1906,1967,1985,1997