1901-2000 Degrees Fahrenheit 1 34.1 34.1 0.0 60 70 1929 1963,2015 1956 1958 normal 2 34.6 32.2 2.4 96 34 1937 2015 1957 1958 top-third 1963,2009 3 35.8 32.1 3.7 122 7 1949 1934 1957 1958 top-tenth 1967,1981,1995 4 36.6 33.5 3.1 119 10 1949 1934 1958 1954 top-tenth 1940 5 39.4 36.4 3.0 124 5 1949 2015 1958 1934 top-tenth 6 42.4 39.9 2.5 120 9 1949 2015 1958 1954 top-tenth 1918,1981 7 46.0 43.3 2.7 125 4 1949 2015 1958 1934 top-tenth 2021 8 48.6 46.0 2.6 124 5 1949 2015 1958 1934 top-tenth 9 49.8 47.2 2.6 124 5 1917,1949 2015 1958 1934 top-tenth 2018 10 50.4 47.6 2.8 125 4 1917 2015 1958 1959 top-tenth 11 49.7 47.2 2.5 125 4 1949 2015 1958 1959 top-tenth 12 48.6 46.5 2.1 122 7 1949 2015 1958 1941 top-tenth 1941,2021 18 46.4 44.3 2.1 121 7 1917 2016 1958 1941 top-tenth 24 48.0 46.5 1.5 113 15 1913 2016 1958 1941 top-third 1988,2014 36 47.3 46.4 0.9 86 41 1914 2016 1958 1942 top-third 1969,1988,2001 48 46.6 46.4 0.2 58 68 1913 2018 1958 1954 normal 1953,1977 60 46.3 46.4 -0.1 41 84 1913,1917 2018 1958 1955 bottom-third 1930,1934,1947