1901-2000 Degrees Fahrenheit 1 62.1 64.4 -2.3 27 102 1917 2018 1976 1977 bottom-third 1931,2002 2 59.5 59.8 -0.3 45 84 1907 1896 1976 1977 normal 1958,1996 3 53.3 55.0 -1.7 23 106 1960 2012 1971 1977 bottom-third 4 45.8 50.4 -4.6 2 127 1960 2012 1960 1977 bottom-tenth 5 41.1 47.0 -5.9 1 128 1978 2012 1978 1977 lowest 6 39.9 45.2 -5.3 1 127 1978 2012 1978 1977 lowest 7 41.1 45.3 -4.2 1 127 1978 2012 1978 1977 lowest 8 42.6 46.7 -4.1 1 127 1978 2012,2017 1978 1977 lowest 9 45.7 49.2 -3.5 1 127 1978 2017 1978 1977 lowest 10 48.6 51.7 -3.1 2 126 1977 2017 1977 1976 bottom-tenth 11 51.2 54.0 -2.8 2 126 1977 2017 1977 1976 bottom-tenth 1968 12 52.9 55.5 -2.6 2 126 1977 2017 1977 1976 bottom-tenth 1918,1968 18 49.7 52.1 -2.4 2 125 1979 2017 1978 1977 bottom-tenth 24 52.6 55.5 -2.9 1 126 1978 2017 1978 1977 lowest 36 53.7 55.5 -1.8 2 124 1979 2018 1970 1977 bottom-tenth 1970,1980 48 53.9 55.5 -1.6 2 123 1980 2019 1978 1977 bottom-tenth 1979 60 54.6 55.5 -0.9 13 111 1981 2020 1972 1977 bottom-third 1983