1991-2020 Degrees Fahrenheit 1 86.0 82.3 3.7 126 3 1903 2022 2007 2008 top-tenth 2 82.6 79.3 3.3 126 3 1903 2022 2007 1998 top-tenth 1998 3 78.4 75.9 2.5 124 5 1903 2022 2007 2006 top-tenth 4 74.7 72.6 2.1 121 8 1903 2022 2007 2006 top-tenth 5 71.9 69.3 2.6 126 3 1903 2017 2007 2008 top-tenth 2009 6 68.4 66.4 2.0 121 8 1903 2017 2007 2006 top-tenth 7 66.6 64.5 2.1 122 6 1903 2017 2007 2006 top-tenth 8 66.0 64.0 2.0 121 7 1912 2017 2007 2006 top-tenth 2000 9 66.7 64.8 1.9 123 5 1977 2017 2007 2006 top-tenth 2009,2016,2020 10 67.9 66.3 1.6 121 7 1977 2017 2007 2006 top-tenth 2009,2012 11 69.3 68.0 1.3 118 10 1977 2017 2007 2006 top-tenth 12 70.2 69.3 0.9 117 11 1977 2017 2007 2006 top-tenth 18 68.1 68.3 -0.2 110 18 1904,1913 2017 2005 2007 top-third 1972,2010 24 69.4 69.3 0.1 112 15 1978 2017,2018 2005 2007 top-third 36 70.0 69.3 0.7 118 8 1905 2018 2007 2008 top-tenth 48 69.7 69.2 0.5 115 10 1915 2020 2007 2008 top-tenth 2013,2015 60 69.4 69.1 0.3 110 14 1979 2020 2007 2008 top-third 2011