1901-2000 Degrees Fahrenheit 1 29.3 31.5 -2.2 41 89 1978 2017 1968 1969 bottom-third 1903,1942 2 24.2 29.6 -5.4 16 114 1979 2017 1963 1969 bottom-third 1902 3 25.7 30.3 -4.6 15 114 1978 1932 1963 1969 bottom-third 4 29.1 33.3 -4.2 13 116 1977 1932 1963 1969 bottom-tenth 5 34.1 37.8 -3.7 12 117 1977 1932 1936 1969 bottom-tenth 6 39.4 42.7 -3.3 9 120 1977 1932 1963 1969 bottom-tenth 1963,1979 7 44.2 47.2 -3.0 8 121 1977 1932 1963 1969 bottom-tenth 1963 8 48.4 50.9 -2.5 12 117 1977 1932 1968 1969 bottom-tenth 1936,1982 9 50.8 53.3 -2.5 8 121 1977 1932 1968 1969 bottom-tenth 1963,2014 10 52.1 54.3 -2.2 9 120 1977 1932 1968 1969 bottom-tenth 1899,1978 11 52.3 54.1 -1.8 13 116 1918 1932 1968 1969 bottom-tenth 12 50.9 53.1 -2.2 8 121 1918 2017 1951 1969 bottom-tenth 18 47.9 49.6 -1.7 7 121 1905 2017 1918 1969 bottom-tenth 1977 24 51.8 53.1 -1.3 10 118 1905 2013,2017 1963 1969 bottom-tenth 1906,1963 36 51.6 53.0 -1.4 5 122 1979 2013 1918 1969 bottom-tenth 48 51.8 53.0 -1.2 4 122 1980 2019 1907 1969 bottom-tenth 1906,1907 60 52.1 53.0 -0.9 9 116 1981 2020 1963 1969 bottom-tenth 1963,1971