1901-2000 Degrees Fahrenheit 1 68.0 68.1 -0.1 59 70 1992 1921 2004 2006 normal 1981 2 67.6 65.7 1.9 102 27 1915 1921 2004 2006 top-third 3 64.3 61.6 2.7 115 14 1924 1921 2006 1999 top-third 1998 4 58.7 56.7 2.0 109 20 1907 1921 2004 2006 top-third 5 53.9 51.2 2.7 117 12 1926 2012 2005 2006 top-tenth 6 47.5 45.8 1.7 104 25 1917 2012 2004 2006 top-third 1911,1919,1973,1981 7 44.1 41.9 2.2 108 21 1912 2012 2005 2006 top-third 1919,1933,2005 8 42.5 39.6 2.9 114 14 1904 2012 2005 2006 top-third 2000 9 42.1 39.0 3.1 114 14 1904 2012 2005 2006 top-third 10 42.4 39.8 2.6 113 15 1904 2012 2005 2006 top-third 1995,2020 11 43.7 41.5 2.2 109 19 1904 2012 2004 2006 top-third 1964,1983,2022 12 45.7 43.6 2.1 110 18 1904 2012 2005 2006 top-third 1995 18 46.8 44.3 2.5 117 11 1918 1999,2012 2005 2006 top-tenth 1988,2022 24 46.5 43.6 2.9 121 6 1905 2017 2006 2000 top-tenth 36 46.2 43.5 2.7 121 5 1918 2012 2006 2000 top-tenth 48 45.9 43.5 2.4 119 6 1907,1918 2013 2006 2002 top-tenth 2000,2008 60 45.4 43.5 1.9 110 14 1908 2002 2005 2006 top-third 2009