1901-2000 Degrees Fahrenheit 1 68.1 65.3 2.8 106 23 1976 1919 1926 1919 top-third 2 73.3 70.6 2.7 115 14 1967 2019 1926 1926 top-third 1921,1926 3 75.4 73.8 1.6 105 24 1967 2019 1924 1926 top-third 1910,1912,1915,1990 4 76.9 75.6 1.3 105 24 1967 2019 1926 1925 top-third 1933 5 77.4 76.2 1.2 104 25 1967 2016,2019 1926 1925 top-third 2015 6 76.8 75.5 1.3 110 19 1967 2019 1926 1925 top-third 1897,1900,1951,1954,1962,2000,2015 7 75.7 73.9 1.8 120 9 1976 2019 1926 1925 top-tenth 1954,1998,2018 8 73.5 71.8 1.7 118 11 1976 2016 1926 1925 top-tenth 1905 9 72.0 69.4 2.6 126 3 1968 2019 1926 1925 top-tenth 1925,2016 10 69.9 67.2 2.7 126 3 1940 2019 1926 1911 top-tenth 11 68.3 65.4 2.9 125 3 1940,1961,1964 2019 1926 1927 top-tenth 2017 12 66.9 64.6 2.3 122 6 1940 2016 1926 1925 top-tenth 2020 18 69.9 68.2 1.7 120 8 1968 2017 1926 1922 top-tenth 24 65.5 64.6 0.9 105 22 1969,1970 2017 1926 1926 top-third 1898,1926,1991,2012,2013 36 66.0 64.6 1.4 117 9 1969,1970 2018 1926 1923 top-tenth 48 65.5 64.6 0.9 108 17 1970 2019 1926 1925 top-third 2000 60 65.5 64.6 0.9 109 15 1970,1971 2020 1926 1926 top-third 1911,1922,1926,2016