1991-2020 Degrees Fahrenheit 1 47.1 52.1 -5.0 15 115 1917 1934 2011 2018 bottom-third 2 45.7 47.3 -1.6 47 83 1917 2012 2013 2018 normal 1896,1915 3 40.9 43.9 -3.0 41 89 1917 2012 1995 2018 bottom-third 1901,1902,1971,1990 4 37.2 40.2 -3.0 34 96 1899 1992 2013 2018 bottom-third 1914,2013 5 36.0 38.0 -2.0 66 64 1899 1992 2013 2018 normal 1931,2010 6 34.9 36.3 -1.4 73 56 1917 1934 2013 2018 normal 1900,1989,1991,1996,2011 7 34.8 36.3 -1.5 69 59 1899 1934 2011 2018 normal 1918,1955,2023 8 36.0 37.5 -1.5 57 71 1899 1934 2010 2018 normal 1931,1997,2008 9 38.9 39.9 -1.0 78 50 1899 1934 2013 2018 normal 1968,1978,1994 10 41.6 42.7 -1.1 74 54 1917 1934 2010 2018 normal 1953,1968,1986 11 44.1 45.2 -1.1 75 53 1899 1934 2010 2018 normal 1925,1986,2001 12 46.0 46.6 -0.6 86 42 1899,1917 1934 2010 2018 top-third 1955 18 43.2 43.2 0.0 101 26 1899 2017 2015 2018 top-third 2015 24 47.0 46.6 0.4 110 16 1917 2017 2015 2018 top-third 36 47.6 46.6 1.0 120 4 1914 2018 2016 2018 top-tenth 48 47.7 46.6 1.1 120 2 1899,1917 2018 2017 2018 top-tenth 2017 60 47.6 46.5 1.1 118 2 1917 2018 2017 2018 top-tenth