1991-2020 Degrees Fahrenheit 1 16.2 32.3 -16.1 1 129 1977 1950 1977 1976 lowest 2 22.7 34.4 -11.7 2 127 1918 1932 1918 1976 bottom-tenth 3 27.0 37.8 -10.8 1 128 1977 1932 1977 1976 lowest 4 32.3 42.4 -10.1 1 128 1977 1932 1977 1976 lowest 5 38.3 47.5 -9.2 1 128 1977 1932 1977 1976 lowest 6 43.5 51.9 -8.4 1 128 1977 1932 1977 1976 lowest 7 47.5 55.2 -7.7 1 128 1977 1932 1977 1976 lowest 8 50.3 57.3 -7.0 1 128 1977 1932 1977 1976 lowest 9 51.2 58.0 -6.8 1 128 1977 1932 1977 1976 lowest 10 51.4 57.7 -6.3 1 128 1977 1932 1977 1976 lowest 11 51.1 56.5 -5.4 1 128 1977 2017 1977 1976 lowest 12 50.4 54.8 -4.4 2 127 1918 2017 1918 1976 bottom-tenth 18 50.3 53.8 -3.5 2 126 1918 2017 1918 1976 bottom-tenth 24 51.9 54.7 -2.8 2 126 1918 1923 1918 1976 bottom-tenth 36 52.4 54.7 -2.3 6 121 1970 2019 1970 1976 bottom-tenth 48 53.1 54.7 -1.6 19 107 1970 2020 1973 1976 bottom-third 1966,1973 60 53.0 54.7 -1.7 14 111 1970,1981 2021 1973 1976 bottom-third 1967,1984