1901-2000 Degrees Fahrenheit 1 38.61 42.76 -4.15 7 122 1983 2021 1924 1926 bottom-tenth 2 46.76 47.74 -0.98 29 100 2000 1999 1926 1925 bottom-third 3 54.36 54.09 0.27 71 58 1972 1999 1926 1922 normal 1910 4 60.14 60.02 0.12 63 66 1972 2021 1926 1922 normal 1966 5 64.52 65.04 -0.52 39 90 1972 2021 1926 1923 bottom-third 6 68.08 68.65 -0.57 34 95 1972 2021 1926 1923 bottom-third 7 69.72 70.46 -0.74 27 102 1972 2021 1925 1926 bottom-third 8 70.00 70.77 -0.77 26 103 1972 2021 1920 1926 bottom-third 9 69.28 69.96 -0.68 25 104 1972 2021 1920 1926 bottom-third 1985 10 67.68 68.27 -0.59 33 96 1912 2012 1924 1926 bottom-third 11 65.91 66.14 -0.23 55 74 1912 2012 1924 1926 normal 12 63.91 64.00 -0.09 59 70 1912 2012 1926 1925 normal 1964 18 65.24 65.55 -0.31 40 88 1912 2012 1926 1925 bottom-third 1958 24 63.89 64.00 -0.11 54 74 1913 2017 1925 1926 normal 1962 36 64.14 63.98 0.16 72 55 1905 2017 1926 1923 normal 1963 48 63.83 63.97 -0.14 46 80 1906 2018 1926 1924 normal 60 63.75 63.96 -0.21 39 86 1907 2016 1921 1926 bottom-third