1901-2000 Degrees Fahrenheit 1 58.3 57.6 0.7 76 53 1951 1988 1999 1997 normal 1909 2 54.8 53.1 1.7 99 30 1917 1988 1999 1997 top-third 1931,1997 3 50.7 48.3 2.4 111 18 1917 1988 1999 1994 top-third 4 46.4 43.5 2.9 113 16 1917 2012 1999 1994 top-third 5 43.0 39.2 3.8 122 7 1917 1934 1999 1992 top-tenth 2007 6 39.8 35.8 4.0 123 6 1917 1934 1999 1992 top-tenth 1981 7 37.7 33.6 4.1 122 6 1917 1934 1999 1992 top-tenth 8 37.9 33.1 4.8 126 2 1917 1934 1999 1934 top-tenth 9 38.7 34.1 4.6 126 2 1917 1934 1999 1934 top-tenth 10 39.9 36.1 3.8 125 3 1917 1934 1999 1934 top-tenth 11 42.2 38.5 3.7 126 2 1917 1934 1999 1934 top-tenth 2016 12 44.2 40.8 3.4 126 2 1917 1934 1999 1934 top-tenth 18 42.0 39.1 2.9 124 4 1917 2016 1999 2000 top-tenth 24 43.6 40.7 2.9 125 2 1917 2016 1999 2000 top-tenth 2017 36 42.9 40.7 2.2 121 5 1917 2017 1999 2000 top-tenth 2001,2007,2014 48 42.4 40.7 1.7 112 13 1899 2018 1999 2000 top-third 2009,2014 60 42.3 40.7 1.6 109 15 1917 2016 1999 2000 top-third