1901-2000 Degrees Fahrenheit 1 86.52 85.14 1.38 104 25 1927 2011 1929 1913 top-third 2 87.83 85.91 1.92 118 11 1992 1936 1929 1901 top-tenth 3 85.92 84.39 1.53 112 17 1915 1936 1929 1930 top-third 4 82.32 81.53 0.79 97 32 1915 1934 1929 1918 top-third 1949 5 79.40 77.92 1.48 116 13 1907 1934 1929 1930 top-tenth 6 74.87 73.77 1.10 100 29 1912 2012 1929 1925 top-third 7 71.55 69.63 1.92 121 8 1912 2012 1929 1925 top-tenth 1988 8 66.83 65.99 0.84 93 36 1912 2012 1929 1925 top-third 9 64.37 63.42 0.95 97 31 1979 2012 1929 1925 top-third 10 62.86 62.35 0.51 81 47 1912 2012 1929 1925 normal 11 63.19 62.76 0.43 80 48 1912 2012 1929 1925 normal 1989 12 64.24 64.01 0.23 70 58 1912 2012 1929 1925 normal 18 67.48 67.26 0.22 72 56 1899 2012 1929 1926 normal 24 63.72 64.00 -0.28 37 90 1913 2017 1929 1928 bottom-third 1968 36 63.81 63.98 -0.17 43 83 1905 2018 1929 1927 normal 48 63.73 63.97 -0.24 36 89 1915 2018 1929 1928 bottom-third 60 63.71 63.96 -0.25 31 93 1907 2020 1924 1929 bottom-third 1912,1924,1962