1901-2000 Degrees Fahrenheit 1 41.1 39.5 1.6 76 54 1960 2012 1989 1991 normal 2 39.1 34.5 4.6 116 14 1978 2012 1991 1990 top-third 3 36.2 31.8 4.4 119 11 1978 2012 1991 1990 top-tenth 2000,2016 4 35.7 31.5 4.2 118 11 1978 2012 1991 1983 top-tenth 5 36.3 33.4 2.9 110 19 1978 2012 1990 1991 top-third 1999 6 39.7 36.8 2.9 113 16 1978 2012 1991 1983 top-third 2006 7 43.3 41.0 2.3 113 16 1977 2012,2017 1991 1991 top-third 1898,1954,1991 8 47.1 44.9 2.2 116 13 1977 2017 1991 1976 top-tenth 1939,1976 9 50.3 48.2 2.1 116 13 1977 2012 1991 1935 top-tenth 1935 10 52.6 50.4 2.2 117 12 1977 2012 1991 1954 top-tenth 1954 11 54.0 51.4 2.6 123 6 1918,1977 2012 1991 1935 top-tenth 1935,2000 12 54.1 51.3 2.8 124 5 1918 2012 1991 1932 top-tenth 18 49.2 46.5 2.7 124 4 1905 2017 1991 1922 top-tenth 1999 24 53.1 51.3 1.8 120 8 1905,1978 2017 1991 1933 top-tenth 1922,1933,2006,2020 36 52.6 51.3 1.3 107 20 1979 2018 1991 1956 top-third 1956,2014 48 52.5 51.3 1.2 108 18 1980 2019 1991 1957 top-third 1957,2001,2003,2005 60 52.4 51.3 1.1 110 15 1981 2020 1991 1957 top-third 1923,2004,2007,2016,2017