1901-2000 Degrees Fahrenheit 1 44.8 46.0 -1.2 38 92 1943 2010 2003 2006 bottom-third 2 40.0 40.7 -0.7 49 81 1916 1945,2012 1996 2006 normal 1996 3 34.4 35.9 -1.5 33 97 1916 2012 1978 2006 bottom-third 4 33.6 33.3 0.3 66 64 1904 2012 2004 2006 normal 1964 5 34.5 32.5 2.0 97 32 1904 2012 2005 2006 top-third 1937 6 36.5 33.8 2.7 109 20 1904 2012 2005 2006 top-third 1932 7 38.5 36.2 2.3 102 27 1904,1918 2012 2005 2006 top-third 1985,2018 8 41.4 39.4 2.0 103 26 1918 2012 2005 2006 top-third 9 44.5 42.6 1.9 104 25 1904 2012 2005 2006 top-third 1983 10 47.5 45.4 2.1 106 23 1904 2012 2005 2006 top-third 1954 11 49.3 47.3 2.0 108 21 1904 2012 2005 2006 top-third 2010,2018 12 49.9 48.1 1.8 107 22 1904 2012 2005 2006 top-third 1949 18 45.5 43.3 2.2 109 19 1905 2017 2006 2002 top-third 24 50.3 48.0 2.3 117 11 1905 2017 2006 2000 top-tenth 1992,2016 36 49.8 48.0 1.8 111 16 1906 2023 2006 2002 top-third 2001,2009,2010 48 49.6 48.0 1.6 106 20 1907 2023 2006 2003 top-third 1992,2003 60 49.2 48.0 1.2 97 28 1908 2023 2005 2006 top-third 1955,1993