1991-2020 Degrees Fahrenheit 1 70.3 71.9 -1.7 50 78 1924 2012 1896 1898 normal 2 68.6 69.7 -1.1 61 67 1929 2012 1899 1898 normal 1932,1965 3 65.1 65.8 -0.7 84 43 1917 2012 1898 1899 normal 1957,2002 4 60.9 61.0 -0.1 89 37 1917 1991 1898 1899 top-third 1914 5 53.8 56.0 -2.2 41 83 1917,1924,1926 2012 1897 1898 bottom-third 6 47.1 51.3 -4.2 13 111 1917 2012 1899 1898 bottom-third 7 43.5 47.8 -4.3 12 110 1917 2012 1899 1898 bottom-tenth 2014 8 41.4 45.8 -4.4 8 114 1904 2012 1899 1898 bottom-tenth 1924,1979,2014 9 40.8 45.2 -4.4 8 114 1904 2012 1899 1898 bottom-tenth 10 41.8 45.9 -4.1 8 114 1904 2012 1899 1898 bottom-tenth 11 43.8 47.5 -3.7 8 114 1918 2012 1899 1898 bottom-tenth 12 45.9 49.4 -3.5 9 113 1904 2012 1899 1898 bottom-tenth 18 47.1 50.0 -2.9 17 101 1918 2012 1899 1898 bottom-third 1937 24 46.8 49.4 -2.6 17 99 1918 2017 1899 1898 bottom-third 36 46.7 49.4 -2.7 13 99 1918 2012 1899 1899 bottom-third 1980 48 -99 49.4 -99 -99 -99 1918 2013 normal 60 -99 49.4 -99 -99 -99 1920,1927 2002 normal