1901-2000 Degrees Fahrenheit 1 24.2 21.3 2.9 83 47 1936 1991 2007 2005 normal 1946 2 21.2 19.1 2.1 79 51 1936 1992 2004 2007 normal 3 21.3 19.6 1.7 79 50 1949 1992 2001 2007 normal 1945 4 23.9 22.1 1.8 79 50 1979 2000 2004 2007 normal 5 28.0 26.3 1.7 88 41 1979 2000 2007 2007 top-third 2007 6 32.5 30.9 1.6 83 46 1979 2016 2007 2007 normal 1955,2007 7 37.3 35.6 1.7 94 35 1979 2016 2007 2006 top-third 1935,1940,1988,2023 8 41.8 39.4 2.4 109 20 1979 1999 2007 2006 top-third 1953,1958 9 43.9 41.5 2.4 111 18 1979 2016 2007 2006 top-third 10 44.7 42.4 2.3 114 15 1917,1979 2016 2007 2006 top-third 1961,2006,2012 11 44.4 42.2 2.2 111 18 1917 2016 2005 2007 top-third 1964 12 43.9 41.1 2.8 123 6 1952 2016 2007 2002 top-tenth 1995 18 40.1 37.7 2.4 116 12 1917 2016 2005 2007 top-tenth 1954,1988 24 43.7 41.1 2.6 123 5 1952 2017 2007 2000 top-tenth 36 43.7 41.1 2.6 125 2 1918 2017 2007 2008 top-tenth 2018 48 43.6 41.1 2.5 125 1 1952 2008,2016 2007 2008 highest 2016 60 43.5 41.1 2.4 124 1 1952 2008,2017 2007 2008 highest 2017