1901-2000 Degrees Fahrenheit 1 22.0 29.4 -7.4 14 116 1978 2017 2007 2013 bottom-third 2 20.7 28.0 -7.3 10 120 1978 2017 1979 2013 bottom-tenth 3 23.6 28.8 -5.2 9 120 1978 1932 1979 2013 bottom-tenth 1912 4 27.5 31.9 -4.4 10 119 1977 1932 1978 2013 bottom-tenth 5 32.9 36.3 -3.4 12 117 1977 1932 1979 2013 bottom-tenth 6 38.5 41.2 -2.7 13 116 1977 1932 1982 2013 bottom-tenth 7 43.2 45.6 -2.4 12 117 1977 1932 1982 2013 bottom-tenth 1902,1979 8 46.9 49.3 -2.4 10 119 1977 1932 1982 2013 bottom-tenth 1936,1982 9 49.5 51.6 -2.1 10 119 1977 1932 1978 2013 bottom-tenth 10 51.0 52.6 -1.6 14 115 1918,1977 1932 1982 2013 bottom-third 2015 11 51.0 52.4 -1.4 15 114 1918 1932 1982 2013 bottom-third 1912 12 49.7 51.3 -1.6 13 116 1918 2017 1979 2013 bottom-tenth 1968,2015 18 47.2 47.9 -0.7 29 99 1905 2017 1997 2013 bottom-third 1906,1952 24 52.1 51.3 0.8 91 37 1905,1918 2017 2011 2013 top-third 1947,1957 36 52.8 51.3 1.5 116 11 1979 2013,2018 2012 2013 top-tenth 1932,1933,1934,1955,2002,2007,2020 48 52.8 51.3 1.5 118 8 1980 2019 2012 2013 top-tenth 1935,2022 60 52.5 51.3 1.2 111 14 1981 2020 2012 2013 top-third 1957,1992,2009,2012