1901-2000 Degrees Fahrenheit 1 59.9 54.6 5.3 122 7 1925 1963 2006 1971 top-tenth 2016 2 64.9 60.5 4.4 123 6 1917 1897 2006 1971 top-tenth 1963,2021 3 69.3 64.8 4.5 127 2 1917 1947 2006 1947 top-tenth 4 70.3 67.5 2.8 123 6 1917 1936 2006 1947 top-tenth 5 70.8 68.2 2.6 124 5 1917 1936 2006 1936 top-tenth 2021 6 70.3 67.2 3.1 127 2 1917 1936 2006 1936 top-tenth 1934 7 67.4 65.0 2.4 123 6 1917 2010 2006 1991 top-tenth 2016 8 65.0 61.8 3.2 127 2 1917 2012 2006 1921 top-tenth 1921,2010 9 60.2 58.2 2.0 116 13 1917 2012 2006 2005 top-tenth 10 57.2 54.9 2.3 120 9 1904 2012 2006 2005 top-tenth 1954 11 55.2 52.6 2.6 122 6 1904 2012 2006 1998 top-tenth 12 54.3 51.6 2.7 121 7 1904 2012 2006 2002 top-tenth 1991 18 58.4 56.8 1.6 115 13 1904 2012 2005 2006 top-tenth 1931,2005 24 53.8 51.6 2.2 121 6 1905 2017 2006 2000 top-tenth 1922,1932,1954 36 53.9 51.6 2.3 123 3 1904,1979 2018 2006 2000 top-tenth 2012,2017 48 53.6 51.6 2.0 123 2 1905 2019 2006 2007 top-tenth 2018 60 53.1 51.6 1.5 118 6 1905,1906 2002,2020 2006 2006 top-tenth 1935,2006,2021