1901-2000 Degrees Fahrenheit 1 26.78 32.68 -5.90 3 126 1983 2021 1909 1913 bottom-tenth 2 35.10 37.19 -2.09 14 115 2000 2021 1911 1913 bottom-third 3 41.81 42.83 -1.02 24 105 1898 2021 1911 1913 bottom-third 1961 4 47.50 48.34 -0.84 26 103 1976 2021 1911 1913 bottom-third 5 52.34 53.09 -0.75 24 105 1976 2021 1912 1913 bottom-third 6 55.96 56.51 -0.55 29 100 1976 2021 1912 1913 bottom-third 7 57.88 58.22 -0.34 40 89 1976 2021 1912 1913 bottom-third 8 58.28 58.47 -0.19 42 87 1976 2021 1912 1913 bottom-third 9 57.48 57.64 -0.16 44 85 1917 2021 1912 1913 normal 1971 10 55.81 56.03 -0.22 50 79 1917 2012 1912 1913 normal 11 53.42 54.01 -0.59 24 105 1917 2012 1912 1913 bottom-third 12 51.84 52.02 -0.18 47 82 1917 2012 1913 1911 normal 1942,1989 18 53.45 53.52 -0.07 52 76 1917 2012,2016 1913 1911 normal 1983 24 51.69 52.02 -0.33 35 93 1917 2017 1913 1911 bottom-third 1952 36 51.21 52.01 -0.80 6 121 1917 2017 1905 1913 bottom-tenth 48 51.41 52.00 -0.59 11 115 1917 2018 1907 1913 bottom-tenth 60 51.61 51.99 -0.38 22 103 1920 2019,2020 1913 1912 bottom-third 1951