1991-2020 Degrees Fahrenheit 1 26.3 29.3 -3.0 46 84 1899 1954 2014 2017 normal 2 29.2 29.1 0.1 90 40 1899 1954 2014 2017 top-third 3 29.4 28.8 0.6 96 33 1899 1934,1981 2017 2017 top-third 2017 4 32.5 30.5 2.0 117 11 1899 1934 2016 2017 top-tenth 5 35.2 33.7 1.5 113 15 1899 1934 2014 2017 top-third 1976 6 39.3 38.0 1.3 114 14 1899 1934 2014 2017 top-third 1995 7 43.2 42.2 1.0 112 16 1899 1934 2014 2017 top-third 8 46.8 45.7 1.1 114 14 1899 2022 2015 2017 top-third 9 48.7 47.6 1.1 117 11 1899 2022 2015 2017 top-tenth 1967,1995,2006 10 48.9 48.0 0.9 110 18 1899 2022 2015 2017 top-third 1941,1961 11 48.5 47.5 1.0 117 11 1899 2022 2015 2017 top-tenth 1964,1967,2004,2006 12 48.1 46.6 1.5 122 6 1913 2013 2015 2017 top-tenth 18 45.6 43.7 1.9 123 3 1913 1935 2016 2017 top-tenth 24 48.2 46.6 1.6 124 2 1900,1914 2017 2016 2017 top-tenth 36 48.2 46.6 1.6 123 1 1918 2018 2017 2018 highest 48 48.0 46.6 1.4 121 1 1916,1919 2018,2019 2017 2018 highest 2019 60 47.5 46.5 1.0 116 4 1917 2019 2016 2017 top-tenth