1901-2000 Degrees Fahrenheit 1 39.3 24.5 14.8 128 1 1989 2015 2014 2015 highest 2 41.1 30.5 10.6 128 1 1917 2015 2014 2015 highest 3 43.2 36.3 6.9 128 1 1917 2015 2014 2015 highest 4 48.6 42.0 6.6 128 1 1917 2015 2014 2015 highest 5 52.4 46.8 5.6 128 1 1917 2015 2014 2015 highest 6 55.0 50.4 4.6 128 1 1917,1976 2015 2014 2015 highest 7 56.2 52.2 4.0 128 1 1917 2015 2014 2015 highest 8 56.8 52.5 4.3 128 1 1917 2015 2014 2015 highest 9 55.3 51.4 3.9 128 1 1917 2015 2014 2015 highest 10 52.3 49.3 3.0 125 4 1917 2012 2014 2012 top-tenth 11 48.4 46.7 1.7 108 21 1917 2012 2014 2012 top-third 1973,2002 12 45.7 44.5 1.2 100 29 1917 2012 2014 2013 top-third 1987,2007,2013 18 47.7 46.5 1.2 104 24 1904 2012 2014 2013 top-third 1913 24 45.1 44.5 0.6 82 46 1905 2012 2014 2014 normal 1939,1942,2014 36 45.3 44.5 0.8 92 35 1926 2012 2005 2014 top-third 1900,1950,1990,2005 48 46.2 44.5 1.7 113 13 1907,1926 2013 2010 2014 top-tenth 2007,2017 60 46.4 44.5 1.9 116 9 1907 2002,2012,2013,2020,2021 2011 2014 top-tenth