1991-2020 Degrees Fahrenheit 1 71.9 75.1 -3.2 30 100 1917 1996 1976 1974 bottom-third 2 67.3 70.7 -3.4 22 108 1983 2006,2018 1975 1976 bottom-third 1913,1924,1935,1942,1970 3 62.0 66.6 -4.6 6 124 1973 2018 1973 1976 bottom-tenth 4 58.6 62.7 -4.1 5 125 1973 2018 1973 1976 bottom-tenth 1913 5 56.0 59.4 -3.4 11 117 1973 2006,2017,2018 1973 1976 bottom-tenth 6 53.9 57.2 -3.3 10 117 1913 2006,2017 1973 1976 bottom-tenth 1979 7 52.7 56.7 -4.0 3 124 1913 2018 1973 1976 bottom-tenth 8 53.6 57.9 -4.3 1 126 1977 2018 1977 1976 lowest 9 55.6 60.0 -4.4 1 126 1977 2018 1977 1976 lowest 10 58.0 62.2 -4.2 1 126 1977 2018 1977 1976 lowest 11 60.0 64.2 -4.2 1 126 1977 2017,2018 1977 1976 lowest 12 61.7 65.8 -4.1 1 126 1977 2017,2018 1977 1976 lowest 18 59.8 62.9 -3.1 2 122 1913 2018 1913 1976 bottom-tenth 24 63.0 65.8 -2.8 3 121 1913 2018 1914 1976 bottom-tenth 36 62.9 65.8 -2.9 2 119 1915 2018 1915 1976 bottom-tenth 1914 48 63.4 65.7 -2.3 2 116 1915 2020 1915 1976 bottom-tenth 60 63.1 65.7 -2.6 1 114 1977 2021 1977 1976 lowest