1901-2000 Degrees Fahrenheit 1 30.9 29.0 1.9 82 48 1978 2017 1948 1949 normal 2 34.1 28.0 6.1 121 9 1978 2017,2023 1948 1949 top-tenth 3 34.0 28.8 5.2 119 10 1977 1932 1948 1949 top-tenth 4 35.7 31.8 3.9 117 12 1977 1932 1948 1949 top-tenth 5 40.0 36.0 4.0 122 7 1977 1932 1949 1932 top-tenth 1983 6 43.3 40.8 2.5 113 16 1977 1932 1948 1949 top-third 2008 7 47.4 45.1 2.3 115 14 1977 1932 1948 1949 top-third 8 51.0 48.6 2.4 118 11 1977 1932 1949 1932 top-tenth 9 53.4 50.8 2.6 119 10 1977 1932 1949 1932 top-tenth 10 54.3 51.8 2.5 118 11 1918 1932 1949 1932 top-tenth 11 53.7 51.5 2.2 117 12 1918 1932 1949 1932 top-tenth 2000 12 52.5 50.4 2.1 115 14 1918 2017 1949 1932 top-third 2006 18 49.6 47.2 2.4 119 9 1918 2017 1949 1933 top-tenth 1922,2000,2020,2021 24 52.4 50.4 2.0 116 12 1918 2017 1949 1932 top-tenth 36 51.4 50.4 1.0 97 30 1918 2018 1949 1939 top-third 1924,1939,1999,2009 48 51.4 50.4 1.0 100 26 1980 2019,2020 1949 1935 top-third 1922 60 51.3 50.4 0.9 97 28 1981 2020 1949 1935 top-third 1956,1957,1991,1993,2011