1901-2000 Degrees Fahrenheit 1 60.7 64.3 -3.6 9 120 1901 1986,2015 1962 1967 bottom-tenth 2 66.3 68.3 -2.0 10 119 1917 2020 1954 1967 bottom-tenth 1920,1954 3 70.3 71.9 -1.6 11 118 1917 2020 1967 1966 bottom-tenth 4 73.0 74.2 -1.2 12 117 1917 2020 1967 1966 bottom-tenth 1920,1940 5 74.5 75.5 -1.0 12 117 1917 2020 1967 1966 bottom-tenth 1920,1940 6 75.3 76.2 -0.9 13 116 1917 1998,2020 1967 1966 bottom-tenth 1908,1940,1943 7 75.2 76.0 -0.8 13 116 1917 1998 1967 1966 bottom-tenth 1928,1930 8 74.8 75.2 -0.4 27 102 1917 2015 1967 1965 bottom-third 1924,1932,1938 9 73.1 74.0 -0.9 14 115 1901 2015,2020 1940 1967 bottom-third 1923,1924,1932 10 71.1 72.5 -1.4 3 126 1901 2020 1940 1967 bottom-tenth 1910,1917,1920 11 69.8 71.2 -1.4 4 125 1940 2020 1940 1967 bottom-tenth 12 69.2 70.1 -0.9 13 115 1940 2020 1966 1967 bottom-tenth 1914,1928,1981 18 71.1 72.2 -1.1 7 121 1940 2020 1940 1967 bottom-tenth 1901,1914,1969 24 69.5 70.1 -0.6 19 108 1902,1941 2020 1967 1966 bottom-third 1971 36 69.4 70.1 -0.7 12 114 1903,1942,1970 2020 1942 1967 bottom-tenth 1901,1941 48 69.6 70.1 -0.5 17 108 1904 2020 1966 1967 bottom-third 1919,1941,1964,1966 60 69.6 70.1 -0.5 14 110 1904,1905,1970 2020 1967 1967 bottom-third 1902,1914,1916,1940,1942,1964,1967,1980,1981