1901-2000 Degrees Fahrenheit 1 72.01 72.10 -0.09 52 77 1927 1983 1968 1970 normal 2017 2 72.19 72.86 -0.67 26 103 1992 1936 1968 1970 bottom-third 1974 3 71.27 71.40 -0.13 47 82 1915 1936,2021 1968 1970 normal 4 68.02 68.60 -0.58 23 106 1907 2018 1968 1970 bottom-third 1946 5 64.47 65.09 -0.62 26 103 1907 2012 1968 1970 bottom-third 1908,1923 6 60.33 61.16 -0.83 16 113 1917 2012 1965 1970 bottom-third 1909 7 56.50 57.25 -0.75 24 105 1917 2012 1965 1970 bottom-third 8 53.11 53.86 -0.75 23 106 1912 2012 1966 1970 bottom-third 9 50.94 51.52 -0.58 27 101 1917 2012 1969 1970 bottom-third 10 49.98 50.54 -0.56 27 101 1912 2012 1969 1970 bottom-third 1937 11 50.19 50.86 -0.67 20 108 1912 2012 1965 1970 bottom-third 12 51.39 52.03 -0.64 21 107 1917 2012 1969 1970 bottom-third 18 54.54 55.07 -0.53 22 106 1917 2017 1969 1970 bottom-third 24 51.49 52.02 -0.53 18 109 1918 2017 1970 1968 bottom-third 1907 36 51.44 52.00 -0.56 14 112 1917 2018 1920 1970 bottom-third 48 51.45 51.99 -0.54 13 112 1920 2018 1920 1970 bottom-third 1980 60 51.54 51.98 -0.44 15 109 1920 2020 1921 1970 bottom-third