1901-2000 Degrees Fahrenheit 1 53.1 55.2 -2.1 25 104 1907 1896 1975 1979 bottom-third 1918,1949,1993 2 47.2 50.3 -3.1 9 120 1960 2012 1975 1979 bottom-tenth 3 41.2 45.7 -4.5 5 124 1958 2012 1978 1979 bottom-tenth 4 39.5 42.7 -3.2 9 120 1978 2017 1979 1977 bottom-tenth 1902 5 39.2 41.4 -2.2 19 109 1978 2012 1979 1976 bottom-third 1964,1969 6 40.3 42.1 -1.8 23 105 1978 2012 1979 1976 bottom-third 1969 7 42.5 44.2 -1.7 20 108 1978 2017 1979 1976 bottom-third 1982,2015 8 45.5 47.3 -1.8 14 114 1977 2017 1978 1979 bottom-third 1905 9 48.7 50.3 -1.6 14 114 1977 2017 1978 1979 bottom-third 1905 10 51.2 52.9 -1.7 11 117 1977 2017 1978 1979 bottom-tenth 11 52.9 54.7 -1.8 8 120 1977 2017 1978 1979 bottom-tenth 12 53.7 55.5 -1.8 6 122 1977 2017 1978 1979 bottom-tenth 1970 18 49.2 51.0 -1.8 5 122 1978 2017 1979 1977 bottom-tenth 1970,1977 24 54.0 55.5 -1.5 7 120 1978 2017 1979 1977 bottom-tenth 1968 36 53.8 55.5 -1.7 3 123 1979 2018 1979 1978 bottom-tenth 48 53.3 55.5 -2.2 1 124 1980 2019 1980 1979 lowest 60 53.9 55.5 -1.6 2 122 1981 2020 1980 1979 bottom-tenth