1901-2000 Degrees Fahrenheit 1 57.0 49.4 7.6 128 2 1905 2017 1999 2000 top-tenth 2 53.9 47.5 6.4 128 2 1978 2017 1999 2000 top-tenth 3 52.1 47.3 4.8 126 3 1899 2017 1999 1907 top-tenth 4 54.0 49.1 4.9 127 2 1899 2017 1999 2000 top-tenth 5 56.3 52.5 3.8 126 3 1899 2017 1998 1999 top-tenth 6 59.6 56.4 3.2 124 5 1977 2017 1998 1999 top-tenth 7 63.1 60.0 3.1 126 3 1977 2017 1998 1999 top-tenth 8 65.5 62.8 2.7 124 5 1977 2017 1998 1999 top-tenth 9 67.0 64.7 2.3 122 7 1977 2017 1998 1999 top-tenth 10 67.6 65.5 2.1 121 8 1977 1999 1998 1999 top-tenth 1934 11 67.5 65.4 2.1 122 7 1977 1999,2012 1998 1999 top-tenth 2016 12 66.7 64.6 2.1 123 6 1977 2012 1998 1999 top-tenth 1935 18 64.5 61.9 2.6 124 4 1977 2017 1999 2000 top-tenth 2012,2013 24 67.1 64.6 2.5 125 3 1977 2013 1999 2000 top-tenth 36 66.2 64.6 1.6 119 8 1979 2013 1999 2000 top-tenth 2020 48 65.9 64.6 1.3 113 13 1961,1979,1980 2019 1999 1957 top-tenth 1957,2007,2008,2009,2016,2017 60 65.8 64.6 1.2 109 16 1962,1977,1980 2020 1999 2000 top-third 2001,2008