1901-2000 Degrees Fahrenheit 1 83.6 81.9 1.7 109 20 1971 2011 2005 2000 top-third 1910 2 83.5 82.1 1.4 104 25 1976 2011 2005 2001 top-third 1963,2016 3 82.6 81.3 1.3 106 23 1976 2011 2005 2001 top-third 1948,2019 4 80.9 79.1 1.8 117 12 1976 2011 2005 2000 top-tenth 1996 5 78.8 76.2 2.6 125 4 1973 2011 2005 2006 top-tenth 6 75.9 72.9 3.0 125 4 1915,1931 2011 2005 2006 top-tenth 7 72.2 69.5 2.7 122 7 1903 2011 2005 2000 top-tenth 8 69.8 66.5 3.3 125 4 1979 2012 2005 2000 top-tenth 9 67.3 64.4 2.9 122 6 1915 2011 2005 2000 top-tenth 10 66.4 63.4 3.0 123 5 1973 2000,2017 2005 2000 top-tenth 2012 11 66.4 63.6 2.8 123 5 1973 2017 2005 2000 top-tenth 2012 12 67.6 64.7 2.9 125 3 1973 2017 2005 2006 top-tenth 2011 18 69.3 67.4 1.9 119 9 1977 2012 2005 2000 top-tenth 1934 24 66.6 64.6 2.0 121 6 1913,1915,1920 2012,2017 2005 2000 top-tenth 1935 36 66.1 64.6 1.5 116 10 1915 2018 2005 2001 top-tenth 2008 48 65.8 64.6 1.2 108 17 1915 2018,2019,2020 2005 2002 top-third 60 65.8 64.6 1.2 107 17 1979 2020 2005 2003 top-third 2008