1991-2020 Degrees Fahrenheit 1 83.0 82.3 0.7 114 15 1903 2022 2010 2012 top-third 2 79.0 79.3 -0.3 103 26 1903 2022 2007 2012 top-third 2001 3 74.9 75.9 -1.0 82 47 1903 2022 2007 2012 normal 4 71.7 72.6 -0.9 86 43 1903 2022 2010 2012 top-third 1916,2004 5 69.0 69.3 -0.3 106 23 1903 2017 2010 2012 top-third 6 66.3 66.4 -0.1 107 22 1903 2017 2010 2012 top-third 1911 7 64.9 64.5 0.4 114 14 1903 2017 2010 2012 top-third 8 64.6 64.0 0.6 114 14 1912 2017 2010 2012 top-third 9 65.2 64.8 0.4 113 15 1977 2017 2010 2012 top-third 10 66.5 66.3 0.2 113 15 1977 2017 2010 2012 top-third 1925,1955 11 68.3 68.0 0.3 114 14 1977 2017 2010 2012 top-third 12 69.7 69.3 0.4 114 14 1977 2017 2010 2012 top-third 18 69.3 68.3 1.0 118 10 1904,1913 2017 2011 2012 top-tenth 24 70.5 69.3 1.2 121 6 1978 2017,2018 2011 2012 top-tenth 2020 36 70.3 69.3 1.0 119 7 1905 2018 2012 2013 top-tenth 48 69.7 69.2 0.5 115 10 1915 2020 2011 2012 top-tenth 2008,2015 60 69.8 69.1 0.7 114 10 1979 2020 2011 2012 top-tenth