1901-2000 Degrees Fahrenheit 1 34.1 34.1 0.0 52 78 1933 1995,2015 2001 2002 normal 1908,1909 2 37.4 32.1 5.3 124 6 1949 2015 2002 1995 top-tenth 3 36.1 31.7 4.4 124 5 1949 2015 2002 1995 top-tenth 4 37.1 33.6 3.5 122 7 1949 2015 2002 2000 top-tenth 5 39.5 37.0 2.5 116 13 1949 2015 2002 2000 top-tenth 2021 6 43.5 41.1 2.4 115 14 1949 2015 2002 2000 top-third 1959 7 47.3 45.2 2.1 113 16 1949 2015 2001 2002 top-third 1938,1980 8 50.9 48.6 2.3 121 8 1949 2015 2002 2000 top-tenth 2009 9 52.8 50.3 2.5 123 6 1949 2015 2002 1934 top-tenth 10 53.1 50.8 2.3 123 6 1917 2015 2001 2002 top-tenth 1934 11 52.7 50.4 2.3 124 5 1949 2015 2002 2002 top-tenth 1935,2002 12 51.5 49.5 2.0 116 13 1949 2015 2001 2002 top-tenth 1940,2013 18 48.7 46.7 2.0 117 11 1949 2016 2002 1997 top-tenth 1982,2014 24 51.7 49.5 2.2 121 7 1913 2016 2002 1935 top-tenth 1935,2014,2023 36 51.3 49.5 1.8 116 11 1914 2016,2017 2002 2003 top-tenth 2005 48 51.2 49.5 1.7 114 12 1915,1949 2018 2002 2003 top-tenth 2006 60 50.8 49.4 1.4 109 16 1917,1949 2018 2002 2003 top-third 2010