1901-2000 Degrees Fahrenheit 1 83.32 85.14 -1.82 9 120 1927 2011 1915 1919 bottom-tenth 2 84.68 85.91 -1.23 17 112 1992 1936 1915 1919 bottom-third 3 83.13 84.39 -1.26 16 113 1915 1936 1915 1919 bottom-third 4 80.30 81.53 -1.23 17 112 1915 1934 1917 1919 bottom-third 5 75.86 77.92 -2.06 2 127 1907 1934 1907 1919 bottom-tenth 6 71.87 73.77 -1.90 5 124 1912 2012 1917 1919 bottom-tenth 7 67.90 69.63 -1.73 8 121 1912 2012 1917 1919 bottom-tenth 8 64.32 65.99 -1.67 9 120 1912 2012 1917 1919 bottom-tenth 9 61.53 63.42 -1.89 7 121 1979 2012 1917 1919 bottom-tenth 10 60.37 62.35 -1.98 4 124 1912 2012 1912 1919 bottom-tenth 11 60.65 62.76 -2.11 4 124 1912 2012 1912 1919 bottom-tenth 12 62.13 64.01 -1.88 4 124 1912 2012 1912 1919 bottom-tenth 18 66.08 67.26 -1.18 6 122 1899 2012 1917 1919 bottom-tenth 24 62.98 64.00 -1.02 5 122 1913 2017 1913 1919 bottom-tenth 36 63.32 63.98 -0.66 13 113 1905 2018 1917 1919 bottom-tenth 48 63.04 63.97 -0.93 4 121 1915 2018 1915 1919 bottom-tenth 60 63.20 63.96 -0.76 5 119 1907 2020 1917 1919 bottom-tenth