1901-2000 Degrees Fahrenheit 1 66.97 68.49 -1.52 15 114 1907 2021 1916 1914 bottom-third 2 61.05 64.35 -3.30 2 127 1907 2018 1907 1916 bottom-tenth 3 56.91 59.91 -3.00 2 127 1907 1934 1907 1916 bottom-tenth 4 52.27 55.31 -3.04 1 128 1917 2012 1917 1916 lowest 5 47.83 51.01 -3.18 1 128 1917 2012 1917 1916 lowest 6 44.57 47.53 -2.96 1 128 1917 2012 1917 1916 lowest 7 42.34 45.42 -3.08 1 127 1917 2012 1917 1916 lowest 8 42.08 44.96 -2.88 1 127 1917 2012 1917 1916 lowest 9 43.19 45.98 -2.79 1 127 1917 2012 1917 1916 lowest 10 45.23 47.86 -2.63 1 127 1917 2016 1917 1916 lowest 11 47.64 50.07 -2.43 1 127 1917 2012 1917 1916 lowest 12 49.86 52.03 -2.17 1 127 1917 2012 1917 1916 lowest 18 48.76 50.52 -1.76 1 127 1917 2017 1917 1916 lowest 24 50.62 52.02 -1.40 2 125 1913 2017 1913 1916 bottom-tenth 36 50.85 52.00 -1.15 1 125 1917 2018 1917 1916 lowest 48 51.19 51.99 -0.80 6 119 1918 2018 1915 1916 bottom-tenth 60 51.15 51.98 -0.83 2 122 1920 2020 1917 1916 bottom-tenth