1901-2000 Degrees Fahrenheit 1 37.7 36.3 1.4 88 41 1976 1913 2002 2006 top-third 1918 2 44.4 42.5 1.9 99 30 1976 1931 2006 2004 top-third 1999 3 50.5 48.5 2.0 116 13 1976 1931 2006 2004 top-tenth 1954,1983,2021 4 55.8 53.5 2.3 123 6 1976 1998 2006 1998 top-tenth 1933,1941 5 58.3 56.7 1.6 117 12 1976 1998 2006 2001 top-tenth 1977,2011 6 59.5 58.1 1.4 116 13 1976 1998 2006 1998 top-tenth 1936,1980 7 59.5 57.9 1.6 118 11 1976 1998 2006 1998 top-tenth 1936,1941,1954,2010,2011 8 57.6 56.5 1.1 106 23 1976 1998 2006 2001 top-third 1937,1986 9 56.4 54.3 2.1 124 5 1976 2016 2006 1998 top-tenth 10 53.5 51.8 1.7 122 7 1917 2016 2006 1998 top-tenth 1938,1963 11 51.0 49.4 1.6 119 10 1917,1979 1998 2006 1998 top-tenth 1931,1933,1941,1946,1986 12 49.3 47.6 1.7 119 9 1917,1979 2016 2006 1998 top-tenth 1954,2015 18 52.3 51.1 1.2 117 11 1917 2016 2006 2000 top-tenth 1921,1931,1981,2000,2011 24 49.0 47.6 1.4 120 7 1918 2017 2006 2000 top-tenth 1939,2000 36 49.0 47.6 1.4 121 5 1905,1918 2017 2006 2000 top-tenth 2012 48 49.0 47.6 1.4 121 4 1906 2018 2006 2001 top-tenth 1934 60 48.7 47.5 1.2 117 7 1906,1979 2019 2006 2002 top-tenth 1934,2016