1901-2000 Degrees Fahrenheit 1 32.77 30.68 2.09 104 25 1911 2016 1962 1934 top-third 2 38.99 36.05 2.94 123 6 1976 2016 1962 1963 top-tenth 3 43.79 41.33 2.46 123 6 1976 2016 1962 1931 top-tenth 1931 4 47.60 45.76 1.84 119 10 1976 2016 1962 1963 top-tenth 5 50.15 48.72 1.43 113 16 1976 2016 1962 1931 top-third 6 51.12 49.87 1.25 110 19 1976 2016 1962 1934 top-third 1983,2002 7 50.68 49.52 1.16 108 21 1976 2016 1962 1934 top-third 8 49.30 48.16 1.14 108 21 1917 2016 1962 1934 top-third 1900 9 47.30 46.14 1.16 107 22 1917 2016 1962 1934 top-third 10 44.78 43.81 0.97 100 29 1917 2016 1962 1934 top-third 1983 11 41.89 41.62 0.27 79 50 1917 2016 1962 1957 normal 12 40.29 40.04 0.25 76 52 1917 2016 1962 1958 normal 18 43.52 43.32 0.20 72 56 1917 2016 1962 1958 normal 24 40.02 40.03 -0.01 59 68 1917 2017 1962 1959 normal 36 39.94 40.02 -0.08 53 73 1918 2017 1962 1960 normal 1948 48 39.94 40.01 -0.07 51 74 1918 2018 1962 1961 normal 60 39.88 40.00 -0.12 43 81 1920 2019 1953 1962 normal 1901,1927