1901-2000 Degrees Fahrenheit 1 33.6 39.3 -5.7 7 123 1916 2012 1896 1899 bottom-tenth 1914 2 31.2 35.0 -3.8 18 112 1934 2012 1899 1898 bottom-third 1926 3 30.8 33.2 -2.4 25 105 1904 2012 1899 1898 bottom-third 1936 4 31.4 33.1 -1.7 29 100 1904 2012 1899 1898 bottom-third 5 33.5 35.1 -1.6 25 104 1904 2012 1899 1898 bottom-third 1901,1961,1996 6 37.0 38.3 -1.3 30 99 1918 2012 1899 1898 bottom-third 1948,1959 7 40.7 42.1 -1.4 21 108 1918 2012 1899 1898 bottom-third 1916,1982 8 44.5 45.8 -1.3 21 108 1904 2012,2016 1899 1898 bottom-third 1896,1917,1923,1982 9 47.6 48.9 -1.3 19 110 1904 2012 1896 1899 bottom-third 1936 10 50.0 50.8 -0.8 30 99 1904 2012 1899 1898 bottom-third 1906 11 50.8 51.6 -0.8 26 103 1918 2012 1899 1898 bottom-third 1928,1961,1978 12 50.7 51.5 -0.8 26 103 1918 2012 1899 1898 bottom-third 1906 18 45.7 47.0 -1.3 10 118 1905 2017 1900 1899 bottom-tenth 1919 24 50.4 51.4 -1.0 14 114 1905 2017 1900 1899 bottom-third 36 50.7 51.4 -0.7 20 107 1906 2013,2018,2022,2023 1900 1899 bottom-third 1909,1942,1965,1970,1979 48 50.8 51.4 -0.6 23 103 1907 2023 1899 1900 bottom-third 1941,1970 60 50.7 51.4 -0.7 18 107 1908 2020 1900 1900 bottom-third 1926