1991-2020 Degrees Fahrenheit 1 69.7 68.8 0.9 110 15 1899 1967,2017 2012 2017 top-third 2 70.7 68.8 1.9 118 7 1899 2014,2022 2016 2017 top-tenth 3 68.4 66.6 1.8 117 8 1899,1954 2015 2016 2017 top-tenth 4 66.3 64.3 2.0 119 5 1899 2015 2017 2015 top-tenth 5 63.4 61.6 1.8 117 7 1899 2015 2017 2016 top-tenth 1926 6 60.3 59.2 1.1 113 9 1899 2015 2017 2016 top-tenth 7 57.7 56.9 0.8 111 11 1899 2015 2017 2016 top-tenth 2003 8 56.1 55.0 1.1 111 10 1955 2015 2017 2016 top-tenth 2004 9 54.2 53.4 0.8 110 10 1899 2015 2017 2016 top-tenth 1941 10 53.5 52.7 0.8 111 9 1899,1917 2015 2017 2016 top-tenth 2004 11 53.5 52.8 0.7 110 10 1899,1917 2015 2017 2016 top-tenth 12 54.5 53.7 0.8 111 8 1917 2015 2017 2016 top-tenth 1926 18 56.4 55.5 0.9 111 4 1917 2015 2017 2016 top-tenth 2021 24 54.1 53.7 0.4 101 11 1917 2016 2014 2017 top-tenth 1992,2003 36 54.6 53.7 0.9 102 4 1911,1917 2016,2017 2014 2017 top-tenth 48 55.1 53.6 1.5 100 1 1912 2018 2017 2018 highest 60 54.8 53.6 1.2 95 1 1913 2018,2019 2017 2018 highest 2019