1901-2000 Degrees Fahrenheit 1 34.4 33.0 1.4 67 62 1989 2015 2005 2008 normal 1975 2 41.8 38.1 3.7 114 15 1917 2015 2008 2006 top-third 3 45.7 43.4 2.3 102 27 1917 2015 2008 2007 top-third 2022 4 50.4 48.8 1.6 91 38 1917 2015 2008 2007 top-third 5 55.3 53.3 2.0 104 25 1917 2015 2008 2007 top-third 1991 6 58.1 56.7 1.4 93 36 1917 2015 2008 2008 top-third 1953,2004,2008 7 59.5 58.4 1.1 89 40 1917 2015 2000 2008 top-third 1957 8 59.7 58.6 1.1 92 37 1917 2015 2003 2008 top-third 1957,2003 9 58.9 57.5 1.4 97 32 1917 2015 2003 2008 top-third 1953 10 57.1 55.7 1.4 97 32 1917 2011 2003 2008 top-third 1977 11 55.1 53.4 1.7 103 26 1917 2012 2007 2008 top-third 1959,2007 12 52.7 51.5 1.2 97 32 1904 2012 2003 2008 top-third 18 54.5 53.2 1.3 101 27 1904 2012 2003 2008 top-third 1973,1985,1995 24 53.2 51.4 1.8 109 19 1905 2012 2005 2008 top-third 2005 36 53.3 51.4 1.9 106 21 1905 2012 2005 2008 top-third 2001,2003 48 53.7 51.4 2.3 112 14 1907 2021,2022 2006 2008 top-third 2010,2015 60 53.7 51.4 2.3 111 14 1907 2020,2021,2022 2008 2008 top-third 2008,2017