1901-2000 Degrees Fahrenheit 1 31.7 24.8 6.9 113 17 1936 1998 2001 2000 top-third 2 31.3 23.1 8.2 126 4 1979 1998 2001 1998 top-tenth 3 31.9 24.0 7.9 126 3 1904 1932 2001 1998 top-tenth 4 36.0 27.5 8.5 128 1 1977 2002 2001 2002 highest 5 39.1 32.5 6.6 127 2 1977 1932 2001 1932 top-tenth 6 42.9 37.7 5.2 125 4 1977 1932 2001 1932 top-tenth 7 47.2 42.4 4.8 126 3 1977 1932 2001 1932 top-tenth 8 50.6 46.3 4.3 126 3 1977 1932 2001 1932 top-tenth 9 52.5 48.8 3.7 126 3 1904,1918 1932 2001 1932 top-tenth 10 53.5 49.8 3.7 126 3 1918 1932 2001 1932 top-tenth 11 53.4 49.6 3.8 126 3 1918 1932 2001 1932 top-tenth 12 51.8 48.5 3.3 125 4 1918 2017 2001 1999 top-tenth 1999 18 46.9 44.9 2.0 115 13 1905 2017 2001 2000 top-tenth 1954,2007 24 50.4 48.4 2.0 115 13 1905 2017 2001 2000 top-tenth 1923 36 50.5 48.4 2.1 122 5 1918 2013 2001 2001 top-tenth 2001,2007 48 50.8 48.4 2.4 125 1 1905,1918 2002 2001 2002 highest 60 50.6 48.4 2.2 124 1 1905,1908 2002 2001 2002 highest