1901-2000 Degrees Fahrenheit 1 31.4 28.9 2.5 88 41 1989 2015 2005 2006 top-third 1939,1952,1986 2 35.5 34.1 1.4 82 47 1917 2015 2005 2006 normal 3 42.9 39.6 3.3 115 14 1917 2015 2005 2006 top-third 1946 4 48.3 45.2 3.1 120 9 1917 2015 2006 2001 top-tenth 5 52.7 49.8 2.9 120 9 1917 2015 2006 2001 top-tenth 6 55.4 53.2 2.2 117 12 1976 1931,2015 2005 2006 top-tenth 2005 7 57.2 55.1 2.1 120 9 1917 2015 2006 2005 top-tenth 2001 8 57.6 55.4 2.2 119 10 1917 2015 2006 1998 top-tenth 2020 9 56.1 54.4 1.7 110 19 1917 2015 2005 2006 top-third 2005 10 54.3 52.6 1.7 116 13 1917 2021 2005 2006 top-tenth 1973,2022 11 51.2 50.2 1.0 98 31 1917 2012 2003 2006 top-third 1900,1918,1957 12 49.5 48.1 1.4 105 24 1917 1998,2012 2005 2006 top-third 1946,2005,2015 18 51.5 49.8 1.7 111 17 1904 2012 2005 2006 top-third 24 50.1 48.1 2.0 116 12 1905 2021 2006 2006 top-tenth 2002,2006 36 49.9 48.1 1.8 117 10 1905,1926 2012 2006 2000 top-tenth 1999 48 49.7 48.1 1.6 117 9 1907 2021,2022 2006 2002 top-tenth 2002,2008,2014 60 49.4 48.1 1.3 107 18 1905,1907 2020,2021 2005 2006 top-third 2005,2009