1991-2020 Degrees Fahrenheit 1 43.9 43.1 0.8 79 50 1994 1926 2004 2005 normal 2 48.2 48.7 -0.5 55 72 1994 1933 2004 2005 normal 1968,1996 3 53.8 54.6 -0.8 74 53 1982 2012 2004 2005 normal 1927,1976,1980 4 58.7 59.6 -0.9 83 43 1982 2012 2004 2005 normal 2013 5 62.8 62.9 -0.1 101 25 1982 2012 2004 2005 top-third 1932,2019 6 64.4 63.9 0.5 111 15 1982 2021 2005 2003 top-third 2007 7 64.0 63.2 0.8 111 14 1916 2021 2005 2003 top-third 8 62.3 61.7 0.6 108 17 1896 2021 2005 2001 top-third 9 59.7 59.9 -0.2 97 28 1912 2014 2005 2004 top-third 1936 10 57.6 57.9 -0.3 98 26 1897 2014 2005 2004 top-third 2019 11 55.8 56.0 -0.2 98 26 1897 2014 2005 2004 top-third 1936,2008 12 54.3 54.2 0.1 101 23 1897 2015 2005 2004 top-third 2019 18 57.4 57.4 0.0 100 21 1898 2015 2005 2004 top-third 24 53.7 54.2 -0.5 91 29 1898 2015 2000 2005 top-third 1926,1927,1939,1959 36 54.0 54.1 -0.1 97 20 1898 2016,2017 2002 2005 top-third 1997,2007 48 54.2 54.1 0.1 102 12 1913 2017 2005 2004 top-third 2007 60 54.1 54.1 0.0 100 12 1975 2018 2005 2005 top-third 2005,2008