1901-2000 Degrees Fahrenheit 1 4.6 9.8 -5.2 27 103 1936 1998 2019 2020 bottom-third 1948 2 11.4 7.0 4.4 98 32 1936 1987 2019 2020 top-third 1986 3 14.4 8.3 6.1 116 13 1936 1998 2020 2016 top-tenth 4 18.6 12.7 5.9 118 11 1936 2002 2020 2017 top-tenth 1992 5 22.3 18.8 3.5 104 25 1936 2012 2020 2017 top-third 1924 6 27.9 24.9 3.0 104 25 1936 2016 2020 2017 top-third 7 33.6 30.7 2.9 108 21 1936 2012,2016 2020 2017 top-third 8 38.2 35.4 2.8 110 19 1936 2012 2020 2017 top-third 1992 9 41.3 38.4 2.9 114 15 1936 2012,2016 2020 2017 top-third 1992,2022 10 42.4 39.9 2.5 111 18 1936 2002 2020 2017 top-third 1921,1981 11 41.9 39.9 2.0 105 24 1936 2002,2016 2020 2017 top-third 12 40.7 38.5 2.2 108 21 1936 2016 2020 2017 top-third 18 36.1 34.0 2.1 107 21 1918 2017 2020 2018 top-third 1981,1989,2011 24 39.9 38.5 1.4 100 28 1918 2017 2020 2018 top-third 1935,1987,2005 36 39.3 38.5 0.8 87 40 1918 2018 2020 2019 top-third 1982,2005 48 39.4 38.4 1.0 87 39 1900,1918,1920 2002 2011 2020 top-third 1932,1944,1985 60 40.1 38.4 1.7 106 19 1920 2002 2015 2020 top-third 2005,2010