1901-2000 Degrees Fahrenheit 1 70.30 68.49 1.81 104 25 1907 2021 1899 1900 top-third 2 66.02 64.35 1.67 112 17 1907 2018 1899 1896 top-third 3 61.21 59.91 1.30 108 21 1907 1934 1899 1896 top-third 2002 4 56.23 55.31 0.92 93 36 1917 2012 1899 1900 top-third 5 51.13 51.01 0.12 64 65 1917 2012 1899 1898 normal 6 48.30 47.53 0.77 91 38 1917 2012 1899 1900 top-third 2003 7 45.91 45.42 0.49 82 46 1917 2012 1899 1900 normal 8 45.79 44.96 0.83 94 34 1917 2012 1899 1900 top-third 1988 9 46.70 45.98 0.72 92 36 1917 2012 1899 1900 top-third 10 48.51 47.86 0.65 91 37 1917 2016 1899 1900 top-third 11 50.62 50.07 0.55 88 40 1917 2012 1899 1900 top-third 12 52.49 52.03 0.46 85 43 1917 2012 1899 1900 normal 1941 18 50.11 50.52 -0.41 29 99 1917 2017 1899 1898 bottom-third 24 51.33 52.02 -0.69 12 115 1913 2017 1899 1898 bottom-tenth 36 51.58 52.00 -0.42 21 105 1917 2018 1899 1898 bottom-third 48 51.51 51.99 -0.48 17 108 1918 2018 1899 1900 bottom-third 60 51.53 51.98 -0.45 16 108 1920 2020 1900 1900 bottom-third