1991-2020 Degrees Fahrenheit 1 29.7 29.0 0.7 93 37 1937 1986 2014 2015 top-third 2 28.7 28.6 0.1 84 45 1979 1934,1981 2014 2015 normal 1999 3 30.6 31.0 -0.4 81 47 1979 1934 2014 2015 normal 1944,1958 4 36.0 34.8 1.2 111 17 1917 1934 2014 2015 top-third 5 41.7 39.7 2.0 121 7 1962 1934 2015 2006 top-tenth 6 46.1 44.4 1.7 123 5 1917 2022 2015 2006 top-tenth 7 49.2 48.0 1.2 115 13 1917 2022 2015 2006 top-tenth 1935 8 51.2 49.9 1.3 118 10 1916,1917 2022 2015 2013 top-tenth 2013 9 50.9 50.1 0.8 111 17 1916 2022 2015 2013 top-third 1967 10 50.2 49.3 0.9 113 15 1917 2022 2015 2013 top-third 1981,1989,2019 11 49.4 48.2 1.2 121 7 1913 2013 2015 2013 top-tenth 1995,2006 12 48.0 46.6 1.4 123 5 1913 2018 2015 2013 top-tenth 1935,2006 18 47.1 45.9 1.2 119 7 1918 1935,2018 2015 2013 top-tenth 24 47.2 46.6 0.6 115 11 1914 2018 2015 2014 top-tenth 36 46.8 46.6 0.2 105 19 1918 2018 2012 2015 top-third 48 47.2 46.6 0.6 116 6 1916 2019 2015 2008 top-tenth 2005,2007,2008,2017,2022,2023 60 47.0 46.5 0.5 107 13 1917 2019 2015 2009 top-third 2003,2009