1901-2000 Degrees Fahrenheit 1 26.5 18.1 8.4 123 7 1912 2006 1931 1932 top-tenth 2 24.9 20.8 4.1 109 20 1918 2002 1931 1932 top-third 1960 3 26.8 25.3 1.5 84 45 1977 2002 1930 1932 normal 4 31.7 30.9 0.8 72 57 1918 1932 1930 1932 normal 5 37.0 36.4 0.6 72 57 1918 1932 1930 1932 normal 1960 6 42.0 41.3 0.7 76 53 1918 1932 1930 1932 normal 1962,1980,2003 7 45.7 45.1 0.6 75 54 1918 1932 1930 1932 normal 1937,1940,1987,2010 8 48.2 47.4 0.8 84 45 1918 1932 1930 1932 normal 1934,2004 9 48.8 48.1 0.7 80 49 1918 1932 1930 1932 normal 1900,1937 10 47.9 47.5 0.4 72 57 1918 1932 1930 1932 normal 1921,1965,1976,2001 11 45.7 45.8 -0.1 54 75 1918 2013 1930 1932 normal 12 43.9 43.5 0.4 69 60 1918 2013 1930 1932 normal 18 45.0 42.8 2.2 110 18 1918 2013,2017 1931 1932 top-third 1992 24 45.7 43.5 2.2 111 17 1918 2013 1931 1932 top-third 2014 36 45.4 43.5 1.9 112 15 1918 2013 1932 1933 top-third 48 44.5 43.5 1.0 93 33 1918 2002 1932 1933 top-third 1950,1957,1999 60 44.0 43.5 0.5 80 45 1908 2003 1932 1932 normal 1932,1949,1954,1986