1991-2020 Degrees Fahrenheit 1 37.0 27.7 9.3 124 1 1925 2005 2004 2005 highest 2 32.6 27.9 4.7 119 5 1920 1981 2004 2003 top-tenth 3 34.6 31.8 2.8 116 8 1920 1981 2004 2003 top-tenth 4 39.3 37.1 2.2 116 8 1920 1981 2004 2000 top-tenth 5 44.4 43.1 1.3 111 13 1913,1920 1981,2017 2004 2003 top-third 2003,2011 6 49.4 48.6 0.8 106 18 1913 2017 2004 2003 top-third 2011 7 53.6 53.0 0.6 106 18 1913 2018 2004 2004 top-third 2000,2004 8 56.0 55.5 0.5 110 14 1913 2017,2018 2004 2003 top-third 2006,2012 9 56.9 56.2 0.7 112 12 1913 2018,2022 2004 2003 top-tenth 10 56.5 55.7 0.8 111 13 1913 2022 2004 2003 top-third 2013 11 55.9 54.8 1.1 116 8 1913 2018 2004 2003 top-tenth 2003 12 53.8 53.2 0.6 111 13 1913 2018 2004 2003 top-third 1978,2003 18 52.0 51.6 0.4 106 17 1913 2018 1999 2004 top-third 1996 24 53.7 53.2 0.5 114 9 1914 2019 2004 2004 top-tenth 1996,2001,2004 36 53.7 53.1 0.6 111 11 1914,1915,1919 2019 2001 2004 top-tenth 1997 48 53.9 53.1 0.8 115 6 1920 2019 2003 2004 top-tenth 2003,2022 60 54.0 53.0 1.0 115 5 1917 2019 2004 2005 top-tenth 2018