1991-2020 Degrees Fahrenheit 1 81.5 76.2 5.3 114 1 1915 1934 1933 1934 highest 2 78.0 73.5 4.5 112 2 1915 2012 1933 1934 top-tenth 3 74.5 68.8 5.7 112 1 1915 1934 1933 1934 highest 4 69.1 63.9 5.2 111 1 1915 1934 1933 1934 highest 5 63.6 59.4 4.2 110 2 1915 2012 1933 1934 top-tenth 6 58.6 55.0 3.6 109 2 1915 2012 1933 1934 top-tenth 7 55.1 51.4 3.7 108 2 1915 2012 1933 1934 top-tenth 8 52.8 48.8 4.0 108 1 1915 1934,2012 1933 1934 highest 2012 9 51.6 47.8 3.8 108 1 1915 1934 1933 1934 highest 10 51.8 48.2 3.6 108 1 1915 1934 1933 1934 highest 11 53.3 49.8 3.5 106 1 1915,1917,1924,1993 1934 1933 1934 highest 12 54.8 51.8 3.0 106 1 1993 1934 1933 1934 highest 18 54.8 52.8 2.0 106 1 1924 1934,2016 1933 1934 highest 2016 24 52.9 51.7 1.2 98 7 1916,1917 2017 1933 1934 top-tenth 1939,2013 36 52.4 51.7 0.7 89 14 1917 2017 1933 1934 top-third 48 52.0 51.7 0.3 82 19 1918 2018 1933 1934 top-third 1940,1956,2008,2022 60 51.4 51.7 -0.3 64 35 1930 2006 1933 1934 normal 1955,1958,2010