1901-2000 Degrees Fahrenheit 1 51.0 53.9 -2.9 25 104 1976 1985 1976 1978 bottom-third 1907 2 57.5 59.2 -1.7 22 107 1976 1919 1976 1978 bottom-third 1923 3 62.6 64.5 -1.9 12 117 1976 1931 1976 1978 bottom-tenth 1903 4 66.8 68.4 -1.6 8 121 1976 2016 1976 1978 bottom-tenth 1898,1901,1968,1969,2008 5 69.5 70.9 -1.4 9 120 1976 2016 1976 1978 bottom-tenth 1898,1937,1961 6 70.7 72.1 -1.4 8 121 1976 2016 1976 1978 bottom-tenth 1950 7 70.5 72.0 -1.5 7 122 1976 1998 1976 1978 bottom-tenth 1940 8 69.8 71.0 -1.2 13 116 1976 1998,2016 1976 1978 bottom-tenth 1950 9 68.2 69.2 -1.0 14 115 1976 2016 1976 1978 bottom-third 1923,1971,1975,1989,1996,1997 10 65.7 67.2 -1.5 6 123 1968,1976 2016 1976 1978 bottom-tenth 1895,1983 11 63.1 65.2 -2.1 2 127 1940 1927 1976 1978 bottom-tenth 1968,1976 12 61.7 63.6 -1.9 3 125 1940 2016 1976 1978 bottom-tenth 18 65.6 66.5 -0.9 14 114 1968 2016,2017 1977 1978 bottom-third 1904,1918,1960,1980,1996 24 61.9 63.6 -1.7 1 126 1979 2017 1979 1978 lowest 36 62.3 63.6 -1.3 4 122 1969,1970 2017,2018 1978 1978 bottom-tenth 1978,1980 48 62.1 63.6 -1.5 1 124 1970,1979 2018,2019 1970 1978 lowest 1970 60 62.4 63.6 -1.2 4 120 1970 2020 1971 1978 bottom-tenth