1901-2000 Degrees Fahrenheit 1 60.3 59.8 0.5 76 54 1907 2006 1976 1978 normal 1917,1968 2 56.1 55.3 0.8 78 52 1960 2012 1978 1977 normal 1907 3 50.0 51.2 -1.2 39 91 1958 2012 1978 1977 bottom-third 1913 4 45.4 48.4 -3.0 11 119 1978 2017 1978 1977 bottom-tenth 2010 5 44.8 47.1 -2.3 16 113 1978 2017 1978 1977 bottom-third 6 46.7 47.5 -0.8 35 94 1940,1978 2017 1978 1976 bottom-third 1906 7 48.3 49.4 -1.1 28 101 1978 2017 1978 1976 bottom-third 8 51.6 52.3 -0.7 32 97 1977 2017 1978 1976 bottom-third 1912,1933,1975 9 54.5 55.1 -0.6 35 94 1977 2017 1978 1976 bottom-third 1926,1983,2015 10 57.0 57.5 -0.5 39 90 1977 2017 1978 1976 bottom-third 1965,1983 11 58.8 59.2 -0.4 43 86 1977 2017 1978 1976 bottom-third 12 59.4 59.9 -0.5 36 93 1977 2017 1978 1976 bottom-third 18 54.2 55.8 -1.6 6 122 1978 2017 1978 1976 bottom-tenth 1918 24 58.9 59.9 -1.0 12 116 1978 2017 1978 1976 bottom-tenth 1971,2015 36 58.1 59.9 -1.8 2 125 1970 2018 1970 1978 bottom-tenth 48 58.5 59.9 -1.4 4 122 1980 2020 1978 1977 bottom-tenth 1970 60 58.6 59.9 -1.3 3 122 1980 2020 1971 1978 bottom-tenth 1971