1901-2000 Degrees Fahrenheit 1 35.9 36.1 -0.2 57 73 1916 2012 2017 2018 normal 2 33.8 32.0 1.8 90 40 1934 2012 2015 2018 top-third 1984 3 32.2 30.4 1.8 93 37 1904 2012 2015 2018 top-third 1975,1989 4 33.0 30.5 2.5 97 32 1904 2012 2015 2018 top-third 5 34.6 32.7 1.9 96 33 1904 2012 2015 2018 top-third 1992 6 37.6 35.9 1.7 94 35 1905 2012 2015 2018 top-third 7 41.7 39.6 2.1 103 26 1918 2012 2015 2018 top-third 8 45.9 43.3 2.6 111 18 1904,1905 2012 2015 2018 top-third 2013 9 49.0 46.3 2.7 115 14 1905 2012 2015 2018 top-third 1932,1949,1995,2013 10 50.7 48.1 2.6 114 15 1904 2012 2015 2018 top-third 2007,2013 11 51.7 48.8 2.9 119 10 1904,1918 2012 2018 2017 top-tenth 12 51.1 48.6 2.5 115 14 1918 2012 2015 2018 top-third 1991,1995,2007 18 47.1 44.3 2.8 116 12 1905 2023 2016 2018 top-tenth 2007 24 51.3 48.6 2.7 118 10 1905 2023 2016 2018 top-tenth 36 51.5 48.5 3.0 119 8 1906 2023 2017 2018 top-tenth 2020 48 51.9 48.5 3.4 124 2 1907 2023 2018 2019 top-tenth 60 51.3 48.5 2.8 120 5 1908 2023 2018 2016 top-tenth 2013,2014,2016