1901-2000 Degrees Fahrenheit 1 60.8 61.2 -0.4 50 79 1945 2012 1928 1926 normal 1943,2004 2 55.6 56.6 -1.0 34 95 1907 2018 1928 1927 bottom-third 1905,1942 3 50.6 51.8 -1.2 24 105 1917 2012 1928 1927 bottom-third 1967 4 46.1 47.3 -1.2 22 107 1917 2012 1924 1928 bottom-third 5 40.5 43.3 -2.8 4 125 1903 2012 1917 1928 bottom-tenth 6 37.2 40.1 -2.9 4 125 1917 2012 1917 1928 bottom-tenth 7 35.0 38.0 -3.0 5 123 1917 1934 1917 1928 bottom-tenth 1973 8 34.7 37.4 -2.7 5 123 1917 1934 1917 1928 bottom-tenth 9 36.0 38.4 -2.4 5 123 1917 1934 1917 1928 bottom-tenth 10 38.1 40.3 -2.2 6 122 1917 1934 1924 1928 bottom-tenth 1903,1924 11 40.4 42.6 -2.2 7 121 1917 1934 1924 1928 bottom-tenth 12 42.5 44.6 -2.1 6 122 1917 1934 1917 1928 bottom-tenth 18 41.7 43.1 -1.4 6 122 1913 2018 1924 1928 bottom-tenth 24 43.3 44.6 -1.3 8 119 1913 2018 1920 1928 bottom-tenth 36 43.8 44.6 -0.8 14 112 1914 2018 1926 1928 bottom-third 1916,1920,1925,1926 48 43.9 44.6 -0.7 16 109 1915 2018 1926 1928 bottom-third 1901,1921,1922,1926,1933,1975 60 44.0 44.5 -0.5 17 107 1917 2018 1924 1928 bottom-third 1903,1907,1909,1923,1975,1977