1901-2000 Degrees Fahrenheit 1 27.99 33.82 -5.83 6 124 1936 1954 1936 1977 bottom-tenth 2 26.93 31.97 -5.04 5 125 1979 2017 1936 1977 bottom-tenth 3 29.04 32.23 -3.19 7 122 1979 2016 1936 1977 bottom-tenth 4 32.50 34.60 -2.10 11 118 1979 2000 1977 1976 bottom-tenth 5 36.80 38.51 -1.71 13 116 1899 2017 1977 1976 bottom-tenth 6 41.65 42.90 -1.25 14 115 1899 2016 1977 1976 bottom-third 7 45.96 47.07 -1.11 15 114 1899 2017 1977 1976 bottom-third 8 49.52 50.39 -0.87 19 110 1899 2017 1977 1976 bottom-third 9 51.83 52.40 -0.57 27 102 1977 2017 1977 1976 bottom-third 10 52.81 53.18 -0.37 33 96 1918,1977 2017 1977 1976 bottom-third 11 52.93 52.98 -0.05 49 80 1918 2017 1977 1976 normal 1965 12 52.11 52.02 0.09 63 66 1918 2017 1977 1975 normal 18 48.23 48.97 -0.74 12 116 1918 2017 1930 1977 bottom-tenth 24 51.36 52.01 -0.65 14 114 1918 2017 1977 1976 bottom-third 1929 36 51.53 52.00 -0.47 18 109 1918 2018 1971 1977 bottom-third 48 51.70 51.99 -0.29 29 97 1918 2019 1973 1977 bottom-third 1952 60 51.86 51.98 -0.12 43 82 1918 2020 1977 1976 normal