1991-2020 Degrees Fahrenheit 1 70.7 68.8 1.9 119 6 1899 1967,2017 2013 2014 top-tenth 2 71.6 68.8 2.8 122 3 1899 2014,2022 2013 2014 top-tenth 3 70.7 66.6 4.1 124 1 1899,1954 2015 2014 2015 highest 4 67.9 64.3 3.6 123 1 1899 2015 2014 2015 highest 5 64.4 61.6 2.8 123 1 1899 2015 2014 2015 highest 6 62.1 59.2 2.9 121 1 1899 2015 2014 2015 highest 7 60.1 56.9 3.2 121 1 1899 2015 2014 2015 highest 8 58.1 55.0 3.1 120 1 1955 2015 2014 2015 highest 9 56.6 53.4 3.2 119 1 1899 2015 2014 2015 highest 10 55.5 52.7 2.8 119 1 1899,1917 2015 2014 2015 highest 11 55.8 52.8 3.0 119 1 1899,1917 2015 2014 2015 highest 12 56.6 53.7 2.9 118 1 1917 2015 2014 2015 highest 18 58.1 55.5 2.6 114 1 1917 2015 2014 2015 highest 24 55.2 53.7 1.5 110 2 1917 2016 2014 2015 top-tenth 36 54.7 53.7 1.0 103 3 1911,1917 2016,2017 2014 2015 top-tenth 48 54.2 53.6 0.6 95 6 1912 2018 2014 2006 top-tenth 2005,2006 60 53.8 53.6 0.2 85 11 1913 2018,2019 2014 2007 top-third 1998,2000,2004,2005