1901-2000 Degrees Fahrenheit 1 44.3 48.0 -3.7 21 109 1895 2018 1968 1969 bottom-third 1967 2 41.2 46.6 -5.4 10 120 1978 1950 1968 1969 bottom-tenth 1968 3 41.9 46.6 -4.7 9 120 1978 1932 1964 1969 bottom-tenth 4 44.0 48.3 -4.3 8 121 1977 1932 1964 1969 bottom-tenth 5 48.0 51.4 -3.4 6 123 1977 1932 1958 1969 bottom-tenth 1958 6 52.0 55.3 -3.3 4 125 1977 1932 1902 1969 bottom-tenth 7 55.6 58.7 -3.1 4 125 1977 1932 1968 1969 bottom-tenth 8 58.8 61.4 -2.6 3 126 1977 1932 1968 1969 bottom-tenth 9 60.9 63.2 -2.3 3 126 1977 1932 1968 1969 bottom-tenth 10 61.8 63.9 -2.1 4 125 1977 2017 1968 1969 bottom-tenth 11 62.0 63.8 -1.8 5 124 1977 2017 1968 1969 bottom-tenth 1984 12 60.8 63.1 -2.3 2 127 1977 2017 1970 1969 bottom-tenth 18 58.2 60.5 -2.3 3 125 1977 2017 1970 1969 bottom-tenth 24 61.2 63.1 -1.9 3 125 1978 2017 1970 1969 bottom-tenth 36 61.2 63.1 -1.9 1 126 1970 2018 1970 1969 lowest 48 61.4 63.1 -1.7 1 125 1970 2019,2020 1970 1969 lowest 60 61.6 63.1 -1.5 1 124 1970 2020 1970 1969 lowest