1901-2000 Degrees Fahrenheit 1 58.73 59.06 -0.33 40 89 1950 2022 1927 1930 bottom-third 2 60.41 59.80 0.61 92 37 1950 2022 1930 1901 top-third 3 59.32 58.41 0.91 99 30 1915 2021 1930 1921 top-third 1981 4 55.98 55.67 0.31 71 58 1907 2018 1930 1922 normal 1984 5 52.38 52.25 0.13 59 70 1907 2012 1929 1930 normal 1995 6 48.37 48.54 -0.17 41 88 1917 2012 1928 1930 bottom-third 7 45.37 44.87 0.50 86 43 1917 2012 1929 1930 top-third 1896,1941 8 42.49 41.73 0.76 91 38 1917 2012 1930 1925 top-third 9 40.14 39.61 0.53 87 41 1917 2012 1930 1921 top-third 10 39.11 38.72 0.39 80 48 1917 2016 1930 1921 normal 11 39.19 38.97 0.22 74 54 1917 2016 1930 1927 normal 12 40.31 40.04 0.27 75 53 1917 2016 1930 1927 normal 18 43.07 42.87 0.20 75 53 1917 2016 1930 1922 normal 1982 24 40.01 40.04 -0.03 56 71 1918 2017 1930 1928 normal 36 39.68 40.02 -0.34 30 96 1918 2017 1930 1929 bottom-third 48 39.74 40.01 -0.27 34 91 1918 2018 1926 1930 bottom-third 60 39.87 40.00 -0.13 46 78 1920 2020 1930 1925 normal 1978