1901-2000 Degrees Fahrenheit 1 14.0 21.3 -7.3 12 118 1912 2006 1895 1903 bottom-tenth 1978 2 15.8 23.6 -7.8 4 125 1977 1932 1904 1903 bottom-tenth 3 21.9 28.4 -6.5 3 126 1977 2002 1904 1903 bottom-tenth 4 29.2 34.4 -5.2 3 126 1977 1932 1904 1903 bottom-tenth 5 35.8 40.2 -4.4 3 126 1977 1932 1904 1903 bottom-tenth 6 41.2 45.4 -4.2 3 126 1977 1932 1904 1903 bottom-tenth 7 45.6 49.4 -3.8 3 126 1977 1932 1904 1903 bottom-tenth 8 47.8 51.8 -4.0 3 126 1918 1932 1904 1903 bottom-tenth 9 49.3 52.6 -3.3 3 126 1918 1932 1904 1903 bottom-tenth 10 49.2 52.1 -2.9 3 126 1918 1932 1904 1903 bottom-tenth 11 48.5 50.6 -2.1 7 122 1918 2013 1904 1903 bottom-tenth 1997 12 46.3 48.4 -2.1 6 123 1918 2013 1904 1903 bottom-tenth 1977 18 45.8 47.4 -1.6 8 120 1918 2013 1904 1903 bottom-tenth 1913,1925,1930 24 47.0 48.4 -1.4 8 120 1918 2013 1904 1903 bottom-tenth 1930,1980 36 47.1 48.4 -1.3 6 121 1918 2013 1904 1903 bottom-tenth 1920 48 47.6 48.4 -0.8 14 112 1918 2002 1904 1903 bottom-third 1979 60 47.9 48.4 -0.5 22 103 1906 2003 1904 1903 bottom-third 1912,1931,1971