1901-2000 Degrees Fahrenheit 1 62.9 61.8 1.1 89 40 1976 1963 1978 1973 top-third 1946,2017 2 66.3 67.4 -1.1 37 92 1976 1931 1976 1978 bottom-third 1896,1924,1994 3 70.0 71.3 -1.3 23 106 1976 1947 1976 1978 bottom-third 1902 4 72.2 73.6 -1.4 18 111 1967,1976 1954 1976 1978 bottom-third 5 72.7 74.2 -1.5 12 117 1976 1954 1976 1978 bottom-tenth 1957,1975 6 71.7 73.3 -1.6 11 118 1976 1998 1976 1978 bottom-tenth 7 70.0 71.4 -1.4 14 115 1976 1954 1976 1978 bottom-third 8 67.8 68.9 -1.1 19 110 1917 2012 1976 1978 bottom-third 1940,1984,1993,2013 9 64.3 66.0 -1.7 4 125 1917 2012 1958 1978 bottom-tenth 1903,1906 10 60.6 63.4 -2.8 1 128 1979 2012 1979 1978 lowest 11 58.9 61.4 -2.5 1 127 1979 2012 1979 1978 lowest 12 58.4 60.4 -2.0 1 127 1912,1979 2012 1912 1978 lowest 1912 18 63.4 64.7 -1.3 7 121 1968 2012 1977 1978 bottom-tenth 1984,2014 24 58.6 60.4 -1.8 1 126 1979 2017 1979 1978 lowest 36 59.0 60.4 -1.4 1 125 1906,1979 2018 1906 1978 lowest 1906 48 59.2 60.4 -1.2 3 122 1905,1906 2019 1906 1978 bottom-tenth 60 59.3 60.4 -1.1 2 122 1906 2020 1906 1978 bottom-tenth