1901-2000 Degrees Fahrenheit 1 33.7 40.0 -6.3 7 123 1977 1950 1978 1980 bottom-tenth 2 37.3 40.8 -3.5 16 113 1918 1932 1978 1980 bottom-third 1956 3 40.6 43.6 -3.0 13 116 1918 1932 1977 1980 bottom-tenth 1936,2001 4 44.7 47.6 -2.9 8 121 1918 1932 1977 1980 bottom-tenth 1940 5 50.5 52.2 -1.7 16 113 1918 1932 1977 1980 bottom-third 1910,1956,1996 6 55.1 56.1 -1.0 24 105 1918 1932 1977 1980 bottom-third 1915,1944 7 58.4 59.1 -0.7 30 99 1918 1932 1977 1980 bottom-third 1911,1959 8 60.1 60.9 -0.8 25 104 1977 1932 1977 1980 bottom-third 1940,1967,1969,1996 9 60.8 61.5 -0.7 26 103 1918 1932,2020 1977 1980 bottom-third 1925,1940,1996 10 60.6 61.1 -0.5 28 101 1918 2020 1977 1980 bottom-third 1921,1948,1959,1966,1975,1993,1996 11 59.3 60.0 -0.7 22 107 1918 2017 1977 1980 bottom-third 1966,1969,1984,2014 12 57.4 58.5 -1.1 16 113 1918 2020 1977 1980 bottom-third 1963,1967 18 57.1 57.7 -0.6 25 103 1905 2017 1979 1980 bottom-third 1915,1925,1966 24 57.6 58.5 -0.9 12 116 1918 2020 1970 1980 bottom-tenth 1965,1967 36 57.7 58.5 -0.8 14 113 1970 2021 1979 1980 bottom-third 1919,1961,1979 48 57.9 58.5 -0.6 19 107 1970 2020 1980 1979 bottom-third 1919,1921,1963 60 57.7 58.5 -0.8 8 117 1970 2020,2021 1972 1980 bottom-tenth 1905,1908,1963,1964,1966,1972