1901-2000 Degrees Fahrenheit 1 53.8 57.1 -3.3 20 109 1960 2012 1896 1895 bottom-third 2 51.4 53.8 -2.4 29 100 1941 1945 1895 1896 bottom-third 1931,1966,1970,1993 3 49.0 51.8 -2.8 28 101 1978 2017 1895 1896 bottom-third 1983 4 48.0 51.1 -3.1 16 112 1978 2017 1896 1896 bottom-third 1912 5 49.3 52.0 -2.7 18 110 1902 2017 1896 1896 bottom-third 6 51.5 54.3 -2.8 11 117 1977 2017 1896 1896 bottom-tenth 1904,1964 7 55.4 57.4 -2.0 16 112 1977 2017 1896 1896 bottom-third 1914,1918,1931 8 58.5 60.2 -1.7 18 110 1977 2017 1896 1896 bottom-third 9 60.9 62.5 -1.6 17 111 1977 2017 1896 1896 bottom-third 1941 10 62.7 64.1 -1.4 17 111 1977 2017 1896 1896 bottom-third 1924 11 63.4 64.8 -1.4 16 112 1977 2017 1896 1896 bottom-third 1924 12 63.5 64.8 -1.3 15 113 1977 2017 1896 1896 bottom-third 1908,1924,1978,1984,1998 18 -99 61.3 -99 -99 -99 1978 2017 normal 24 -99 64.8 -99 -99 -99 1978 2017 normal 36 -99 64.8 -99 -99 -99 1970 2018 normal 48 -99 64.8 -99 -99 -99 1905,1970,1971 2020 normal 60 -99 64.8 -99 -99 -99 1970 2020 normal