1991-2020 Degrees Fahrenheit 1 44.4 41.6 2.8 109 18 1985 2016 2007 2001 top-third 2 48.5 47.0 1.5 100 24 1985 1988 2007 2001 top-third 1901 3 54.2 53.3 0.9 94 29 1985 1963 2007 2001 top-third 4 59.2 58.8 0.4 95 28 1985 1967 2007 2003 top-third 1958,1974 5 62.3 62.2 0.1 91 32 1916 2021 2007 2006 top-third 1917,2013 6 62.9 62.9 0.0 90 33 1916 2021 2005 2007 top-third 1918,1934,1999,2018 7 62.6 62.5 0.1 90 33 1916 2021 2007 2007 top-third 1973,2004,2007 8 60.7 61.1 -0.4 75 48 1916 2021 2002 2007 normal 1922,1977,1986 9 58.6 59.4 -0.8 57 66 1955 2021 2002 2007 normal 1924,1942,1968,1969,1999,2009 10 56.9 57.4 -0.5 72 51 1916,1955 2015 2002 2007 normal 11 54.7 55.5 -0.8 72 51 1916 2015 2002 2007 normal 1904,1906,1970,1991 12 53.1 53.7 -0.6 77 45 1916 2015 2002 2007 normal 1906,1970,2000 18 56.4 56.8 -0.4 80 40 1916 2015 2001 2007 top-third 1925,1961,1980,2000,2017 24 53.4 53.7 -0.3 86 33 1917 2016 2002 2007 top-third 1925,1927,1974,1983,1993,2001,2018 36 53.7 53.8 -0.1 91 26 1913,1917 2016 2002 2007 top-third 1983 48 53.8 53.8 0.0 101 14 1913 2016 2003 2007 top-third 1940,1968,1989,1995,2000,2001 60 53.9 53.8 0.1 100 13 1913,1920 2016 2004 2007 top-third 1991,1998,2020