1991-2020 Degrees Fahrenheit 1 50.0 52.1 -2.1 51 78 1917 1934 2015 2014 normal 2 46.6 47.4 -0.8 74 55 1917 2012 2015 2014 normal 1966 3 43.6 43.9 -0.3 99 30 1917 2012 2013 2015 top-third 4 41.6 40.2 1.4 119 10 1899 1992 2015 2012 top-tenth 5 39.2 38.0 1.2 118 11 1899 1992 2014 2015 top-tenth 2005 6 37.3 36.3 1.0 115 13 1917 1934,1992 2014 2015 top-tenth 1994 7 36.9 36.3 0.6 112 15 1899 2000 2014 2015 top-third 1999 8 38.8 37.5 1.3 116 11 1899 1934 2014 2015 top-tenth 2005,2006 9 41.7 40.0 1.7 123 4 1899 1934 2015 2000 top-tenth 1981 10 44.3 42.7 1.6 122 5 1917 1934 2015 2012 top-tenth 2004,2012 11 46.4 45.2 1.2 117 10 1899 1934 2015 2012 top-tenth 12 48.0 46.6 1.4 122 5 1917 1934 2015 2012 top-tenth 1981,2004,2012 18 44.6 43.2 1.4 123 3 1899 2017 2015 2004 top-tenth 24 47.7 46.6 1.1 121 4 1917 2017 2015 2004 top-tenth 1935,2004 36 47.3 46.6 0.7 115 8 1914 2018 2015 2006 top-tenth 48 47.1 46.6 0.5 113 8 1899,1915,1917 2018 2015 2015 top-tenth 2003,2015,2022 60 47.3 46.5 0.8 112 7 1917 2018 2015 2007 top-tenth 2004,2021