1901-2000 Degrees Fahrenheit 1 70.5 71.9 -1.4 27 102 1976 1933 1919 1922 bottom-third 1903,1919 2 67.6 68.0 -0.4 43 86 1961 1896 1921 1922 bottom-third 3 63.8 64.2 -0.4 46 83 1971 1908,2012 1920 1922 normal 1973,2010 4 60.3 60.7 -0.4 49 80 1960,1971 1927 1920 1922 normal 1959 5 58.9 57.9 1.0 86 43 1940,1978 2017 1920 1922 top-third 1953 6 58.4 56.3 2.1 108 20 1978 2017 1921 1922 top-third 7 58.5 56.1 2.4 116 12 1977 2017 1921 1922 top-tenth 2019 8 59.4 57.3 2.1 113 15 1977 2017 1921 1922 top-third 1925 9 61.5 59.3 2.2 118 10 1977 2017 1921 1922 top-tenth 1974,1991,2021 10 63.4 61.4 2.0 115 13 1977 2017 1921 1922 top-tenth 11 65.0 63.2 1.8 115 13 1977 2017 1921 1922 top-tenth 12 66.2 64.5 1.7 115 13 1977 2017 1921 1922 top-tenth 18 63.9 61.7 2.2 120 7 1977 2017 1921 1922 top-tenth 24 66.7 64.5 2.2 122 5 1969 2017 1922 1923 top-tenth 36 66.2 64.4 1.8 118 8 1970 2018 1922 1923 top-tenth 48 66.1 64.4 1.7 118 7 1971 2019,2020 1922 1923 top-tenth 2017 60 65.8 64.4 1.4 118 6 1970,1971 2020 1922 1923 top-tenth 1936