1901-2000 Degrees Fahrenheit 1 63.6 62.0 1.6 99 31 1983 1896 1914 1912 top-third 1912,1964 2 54.7 58.2 -3.5 7 123 1960 1908 1915 1914 bottom-tenth 3 52.1 54.6 -2.5 16 114 1958 1927 1902 1914 bottom-third 1899,1996 4 49.6 52.0 -2.4 15 115 1978 2017 1905 1914 bottom-third 1970 5 48.2 50.8 -2.6 9 120 1978 1927 1902 1914 bottom-tenth 1970,1984 6 48.8 51.1 -2.3 13 116 1977 1932 1902 1914 bottom-tenth 7 50.8 52.8 -2.0 14 115 1977 1932,2017 1902 1914 bottom-third 1981,1984 8 53.5 55.4 -1.9 14 115 1977 1932,2017 1902 1914 bottom-third 9 56.2 58.0 -1.8 12 117 1977 2017 1902 1914 bottom-tenth 10 58.7 60.1 -1.4 16 113 1977 2017 1902 1914 bottom-third 1984 11 60.8 61.6 -0.8 29 100 1977 2017 1914 1914 bottom-third 1914,1941,1983 12 61.6 62.3 -0.7 31 98 1977 2017 1914 1914 bottom-third 1914,1947,1983 18 57.9 58.5 -0.6 27 101 1977 2017 1906 1914 bottom-third 1904,1906,1960,1966,1983,1997 24 61.6 62.3 -0.7 27 101 1978 2017 1905 1914 bottom-third 1961,1982,1983 36 61.9 62.3 -0.4 32 95 1970 2021 1906 1914 bottom-third 1901,1941,1994 48 62.1 62.3 -0.2 34 92 1971 2020 1907 1914 bottom-third 1903,1906,1907,1987,1997 60 62.3 62.3 0.0 43 82 1970,1971 2020 1908 1914 normal 1994,2014