1901-2000 Degrees Fahrenheit 1 36.8 24.8 12.0 128 2 1936 1998 2016 1998 top-tenth 2 32.4 23.1 9.3 128 2 1979 1998 2016 1998 top-tenth 3 29.8 24.0 5.8 120 9 1904 1932 2015 2016 top-tenth 4 33.9 27.5 6.4 124 5 1977 2002 2015 2016 top-tenth 5 38.4 32.5 5.9 126 3 1977 1932 2016 2002 top-tenth 6 43.5 37.7 5.8 127 2 1977 1932 2016 1932 top-tenth 7 47.9 42.4 5.5 127 2 1977 1932 2016 1932 top-tenth 8 51.2 46.3 4.9 127 2 1977 1932 2016 1932 top-tenth 9 53.4 48.8 4.6 127 2 1904,1918 1932 2016 1932 top-tenth 10 54.0 49.8 4.2 127 2 1918 1932 2016 1932 top-tenth 11 53.5 49.6 3.9 127 2 1918 1932 2016 1932 top-tenth 12 52.6 48.5 4.1 128 1 1918 2017 2016 2017 highest 18 49.4 44.9 4.5 127 1 1905 2017 2016 2017 highest 24 51.9 48.4 3.5 127 1 1905 2017 2016 2017 highest 36 50.2 48.4 1.8 115 12 1918 2013 2016 2013 top-tenth 1989 48 49.2 48.4 0.8 92 34 1905,1918 2002 2016 2014 top-third 1940,1988,1999,2011 60 49.8 48.4 1.4 111 14 1905,1908 2002 2016 2013 top-third 2005,2007,2019