1901-2000 Degrees Fahrenheit 1 23.4 24.8 -1.4 56 74 1899 2012 1906 1905 normal 1895 2 17.0 18.4 -1.4 57 73 1899 2016 1906 1905 normal 1952 3 9.2 14.4 -5.2 20 110 1936 2012 1904 1906 bottom-third 2019 4 8.9 14.0 -5.1 15 114 1936 2012 1904 1906 bottom-third 5 12.0 16.5 -4.5 14 115 1936 2012 1904 1906 bottom-third 1949 6 17.5 21.1 -3.6 17 112 1936 2012 1904 1906 bottom-third 7 23.8 26.1 -2.3 24 105 1936 2012 1904 1906 bottom-third 1962,1994 8 29.1 31.2 -2.1 23 106 1897,1936 2012 1904 1906 bottom-third 1913,2019 9 33.4 35.4 -2.0 23 106 1897 2012 1904 1906 bottom-third 10 36.3 38.2 -1.9 24 105 1897 2012 1904 1906 bottom-third 11 37.6 39.6 -2.0 19 110 1936 2012,2016 1904 1906 bottom-third 12 38.5 39.7 -1.2 29 100 1936 2016 1904 1906 bottom-third 1908,1948,1950,2009 18 32.5 33.5 -1.0 34 94 1951 2017 1905 1906 bottom-third 1919,1921,1923,2014 24 38.6 39.7 -1.1 25 103 1952 2017 1905 1906 bottom-third 1928,1949,1950,1969 36 38.7 39.7 -1.0 26 101 1899 2000 1906 1903 bottom-third 1909,1948,1969 48 38.1 39.6 -1.5 9 117 1899 1990,1992,2002,2018 1906 1905 bottom-tenth 60 37.9 39.6 -1.7 4 121 1900 1992 1901 1906 bottom-tenth 1901