1901-2000 Degrees Fahrenheit 1 63.1 61.5 1.6 101 28 1903 1976 1951 1952 top-third 1941,1984 2 58.9 57.1 1.8 104 25 1917 1999 1952 1949 top-third 3 53.4 51.6 1.8 110 19 1926 2010 1952 1949 top-third 1987,2001,2011,2013 4 47.9 45.9 2.0 109 20 1926 2010 1952 1949 top-third 2006 5 43.0 40.4 2.6 115 14 1926 2012 1952 1949 top-third 6 39.8 36.6 3.2 119 10 1907 2012 1952 1949 top-tenth 1999 7 37.7 34.4 3.3 117 11 1907 2012 1952 1949 top-tenth 8 37.4 34.4 3.0 116 12 1905,1918 2012 1952 1949 top-tenth 1983 9 38.1 35.7 2.4 112 16 1905,1918 2012 1952 1951 top-third 1921,1951 10 40.1 37.8 2.3 110 18 1918 2012 1952 1949 top-third 1921 11 42.4 40.1 2.3 111 17 1905 2012 1952 1949 top-third 2018 12 44.7 42.4 2.3 113 15 1905 2012 1952 1949 top-third 18 42.4 40.4 2.0 111 17 1905 2013 1952 1953 top-third 24 43.7 42.3 1.4 101 26 1905 2013 1952 1950 top-third 1998,2001 36 43.8 42.3 1.5 105 21 1906 2012,2018 1952 1951 top-third 1954,2016 48 43.6 42.3 1.3 101 24 1907 2013 1951 1952 top-third 1955,1998,2005,2006 60 44.0 42.3 1.7 108 16 1908 2020 1952 1953 top-third 2000,2001,2006,2008,2009