1991-2020 Degrees Fahrenheit 1 54.1 52.1 2.0 108 22 1917 1934 2019 2018 top-third 2 47.2 47.3 -0.1 84 46 1917 2012 2019 2018 normal 1932,1941,1966,1972 3 44.1 43.9 0.2 105 25 1917 2012 2019 2018 top-third 2014 4 39.7 40.2 -0.5 96 34 1899 1992 2019 2018 top-third 2001 5 38.1 38.0 0.1 104 26 1899 1992 2019 2018 top-third 6 37.0 36.3 0.7 109 20 1917 1934 2019 2018 top-third 1954,1969 7 36.6 36.3 0.3 105 23 1899 1934 2019 2018 top-third 8 37.0 37.5 -0.5 90 38 1899 1934 2019 2018 top-third 1994 9 40.0 39.9 0.1 105 23 1899 1934 2019 2018 top-third 1941,1982 10 43.0 42.7 0.3 110 18 1917 1934 2019 2018 top-third 11 45.5 45.2 0.3 109 19 1899 1934 2019 2018 top-third 2002 12 46.8 46.6 0.2 108 20 1899,1917 1934 2019 2018 top-third 1941,2005,2007 18 42.8 43.2 -0.4 94 33 1899 2017 2014 2019 top-third 1961 24 46.4 46.6 -0.2 98 28 1917 2017 2011 2019 top-third 1934,1999,2009 36 46.9 46.6 0.3 111 13 1914 2018 2015 2019 top-third 1936,2001,2002,2008,2013 48 47.4 46.6 0.8 117 5 1899,1917 2018 2016 2019 top-tenth 2023 60 47.5 46.5 1.0 117 3 1917 2018 2017 2019 top-tenth 2017