1901-2000 Degrees Fahrenheit 1 65.9 68.1 -2.2 25 104 1917 1896,2018 1983 1982 bottom-third 1966 2 61.9 64.0 -2.1 17 112 1907 1896 1983 1982 bottom-third 1940,1990 3 57.7 59.6 -1.9 15 114 1960 2012 1983 1982 bottom-third 1917 4 54.6 55.4 -0.8 36 93 1960 2012 1983 1982 bottom-third 1919 5 50.6 52.3 -1.7 23 106 1978 2012 1983 1982 bottom-third 1928 6 48.1 50.6 -2.5 6 122 1978 2012 1978 1983 bottom-tenth 7 48.4 50.5 -2.1 11 117 1940 2012 1978 1983 bottom-tenth 8 50.1 51.7 -1.6 14 114 1978 2017 1980 1983 bottom-third 1915,1924,1970,1971,1980,1996 9 52.4 54.0 -1.6 13 115 1977,1978 2017 1980 1983 bottom-tenth 1936,1996 10 55.2 56.4 -1.2 17 111 1977 2017 1980 1983 bottom-third 1899,1904,1993,1996,2014 11 57.4 58.5 -1.1 18 110 1968 2017 1980 1983 bottom-third 1905,1931,1996 12 58.7 59.9 -1.2 15 113 1977 2017 1980 1983 bottom-third 1902,1996 18 55.8 56.8 -1.0 17 110 1980 2017 1980 1983 bottom-third 1962,2015 24 58.9 59.9 -1.0 13 114 1978 2017 1980 1983 bottom-tenth 1941,1960 36 59.1 59.9 -0.8 13 113 1970 2018 1980 1983 bottom-tenth 48 59.3 59.9 -0.6 15 110 1980 2019,2020 1983 1977 bottom-third 1905,1960,1972,1977,1985 60 59.1 59.9 -0.8 12 112 1980 2020 1982 1983 bottom-tenth 1968,1978