1901-2000 Degrees Fahrenheit 1 36.9 38.3 -1.4 38 92 1917 1934 1922 1921 bottom-third 1944 2 32.8 36.2 -3.4 12 118 1917 2015 1922 1921 bottom-tenth 1936 3 32.6 34.2 -1.6 28 102 1922 2015 1922 1921 bottom-third 1899,1910 4 31.7 33.6 -1.9 20 109 1949 1934 1922 1921 bottom-third 5 32.1 34.4 -2.3 14 115 1917 1934 1922 1921 bottom-third 6 34.8 36.7 -1.9 16 113 1917 2015 1922 1921 bottom-third 1910,1950 7 38.3 39.6 -1.3 23 106 1917 2015 1922 1921 bottom-third 1950,1957 8 41.5 42.7 -1.2 24 105 1917 2015 1922 1921 bottom-third 1936,1986 9 44.2 45.1 -0.9 29 100 1917 2015 1922 1921 bottom-third 1916 10 45.8 46.3 -0.5 33 96 1917 2015 1922 1921 bottom-third 1900,1902,1909,1925,1969 11 46.1 46.7 -0.6 32 97 1917 2015 1922 1921 bottom-third 1921,1931,1944 12 45.5 46.5 -1.0 21 108 1917 2015 1922 1921 bottom-third 18 41.6 43.2 -1.6 5 123 1917 2016 1921 1922 bottom-tenth 1900,1921,1933 24 44.9 46.5 -1.6 4 124 1913,1917 2016 1922 1922 bottom-tenth 1904,1922 36 45.1 46.5 -1.4 5 122 1913 2016 1922 1921 bottom-tenth 48 45.1 46.4 -1.3 2 124 1913 2016,2018 1913 1922 bottom-tenth 60 45.3 46.4 -1.1 4 121 1917 2018 1917 1922 bottom-tenth 1900,1901,1903,1904,1916,1924