1901-2000 Degrees Fahrenheit 1 74.5 75.9 -1.4 32 97 1974 2019 1897 1896 bottom-third 1944 2 77.4 78.9 -1.5 19 110 1974 2019 1897 1896 bottom-third 1973 3 79.4 80.0 -0.6 36 93 1974 2011 1897 1896 bottom-third 1916,1920 4 79.5 79.9 -0.4 40 89 1974 2011 1895 1896 bottom-third 5 77.9 78.4 -0.5 38 91 1976 2011 1895 1896 bottom-third 6 75.7 76.2 -0.5 41 88 1976 2011 1895 1896 bottom-third 1917,1995 7 73.3 73.3 0.0 51 78 1903 2011 1895 1896 normal 1904,1952,1974 8 70.5 70.3 0.2 66 63 1903 2011 1895 1896 normal 1936,1974,1985,1995,2010 9 67.2 67.6 -0.4 38 91 1979 2011 1895 1896 bottom-third 1984,1992,1993 10 65.4 65.5 -0.1 47 81 1915,1973,1979 2011,2022 1897 1896 normal 1898,1900,1969,1977,1992 11 64.3 64.5 -0.2 44 84 1973 2000 1897 1896 normal 1914,1969 12 64.2 64.7 -0.5 32 96 1973 2017 1897 1896 bottom-third 1914,1930,1966,2014 18 68.8 68.5 0.3 80 48 1973,1977 2012 1896 1897 normal 1909,1932,1951,1965,1972,1996 24 64.3 64.6 -0.3 33 94 1913 2012,2017 1897 1897 bottom-third 1916,1930,1958,1966,1993 36 -99 64.6 -99 -99 -99 1914,1915 2018 normal 48 -99 64.6 -99 -99 -99 1915 2019 normal 60 -99 64.6 -99 -99 -99 1916,1979 2020 normal