1901-2000 Degrees Fahrenheit 1 34.6 30.4 4.2 107 23 1934 2018 2007 2002 top-third 1960 2 34.7 30.2 4.5 116 14 1904 2023 2007 2006 top-third 2016 3 35.0 31.5 3.5 104 25 1918 2002,2016 2005 2007 top-third 1950 4 37.3 34.6 2.7 104 25 1918 2016 2005 2007 top-third 1997 5 42.1 38.6 3.5 116 13 1918 2002,2016 2005 2007 top-tenth 1999,2018,2021 6 46.4 43.0 3.4 117 12 1918 2016 2007 2006 top-tenth 1999 7 50.1 47.0 3.1 115 14 1918 2016 2007 2006 top-third 2019 8 53.0 50.2 2.8 112 17 1905 2016 2005 2007 top-third 9 54.8 52.1 2.7 112 17 1904 2016 2005 2007 top-third 1999 10 55.4 52.7 2.7 116 13 1918 2016 2007 2007 top-tenth 1992,1999,2007,2018 11 54.7 52.2 2.5 110 19 1918 2016 2005 2007 top-third 12 53.4 51.0 2.4 109 20 1918 2012 2005 2007 top-third 18 50.9 48.3 2.6 112 16 1905 2017 2006 2007 top-third 2003 24 53.6 51.0 2.6 116 12 1905 2017 2006 2007 top-tenth 2019 36 53.7 51.0 2.7 116 11 1918 2013 2007 2008 top-tenth 48 53.4 51.0 2.4 114 12 1905 2019,2023 2007 2002 top-tenth 2002,2009,2016 60 53.1 51.0 2.1 108 17 1908 2020 2007 2003 top-third 2003