1901-2000 Degrees Fahrenheit 1 16.2 18.1 -1.9 39 91 1912 2006 1925 1926 bottom-third 2 17.7 20.8 -3.1 19 110 1918 2002 1925 1926 bottom-third 1930,1961 3 22.0 25.3 -3.3 11 118 1977 2002 1920 1926 bottom-tenth 4 27.6 30.9 -3.3 7 122 1918 1932 1926 1925 bottom-tenth 5 33.3 36.4 -3.1 6 123 1918 1932 1920 1926 bottom-tenth 6 38.7 41.3 -2.6 7 122 1918 1932 1920 1926 bottom-tenth 7 42.7 45.1 -2.4 6 123 1918 1932 1918 1926 bottom-tenth 8 44.7 47.4 -2.7 4 125 1918 1932 1918 1926 bottom-tenth 9 45.6 48.1 -2.5 5 124 1918 1932 1925 1926 bottom-tenth 10 44.6 47.5 -2.9 2 127 1918 1932 1918 1926 bottom-tenth 11 42.5 45.8 -3.3 2 127 1918 2013 1918 1926 bottom-tenth 12 40.5 43.5 -3.0 3 126 1918 2013 1918 1926 bottom-tenth 18 40.2 42.8 -2.6 3 125 1918 2013,2017 1918 1926 bottom-tenth 24 41.7 43.5 -1.8 6 122 1918 2013 1925 1926 bottom-tenth 36 41.5 43.5 -2.0 3 124 1918 2013 1919 1926 bottom-tenth 48 41.6 43.5 -1.9 2 124 1918 2002 1918 1926 bottom-tenth 60 42.2 43.5 -1.3 8 117 1908 2003 1921 1926 bottom-tenth 1905,1906,1907,1930