1991-2020 Degrees Fahrenheit 1 40.6 46.8 -6.2 8 118 1907 2010 1907 1919 bottom-tenth 2 37.0 41.3 -4.3 27 97 1926 2012 1916 1919 bottom-third 1975 3 32.0 36.8 -4.8 19 105 1904 2012 1917 1919 bottom-third 2015 4 28.4 34.2 -5.8 8 114 1904 2012 1904 1919 bottom-tenth 5 27.3 33.7 -6.4 3 119 1904 2012 1904 1919 bottom-tenth 6 29.2 34.9 -5.7 3 119 1904 2012 1918 1919 bottom-tenth 1918 7 32.7 37.3 -4.6 6 116 1904 2012 1918 1919 bottom-tenth 8 36.5 40.6 -4.1 9 113 1904 2012 1918 1919 bottom-tenth 1977 9 40.0 43.9 -3.9 4 118 1904 2012 1918 1919 bottom-tenth 1977,1979,1982 10 43.3 46.7 -3.4 9 113 1904 2012 1918 1919 bottom-tenth 1943,1963 11 46.0 48.6 -2.6 27 95 1904,1918 2012 1918 1919 bottom-third 1993 12 46.8 49.4 -2.6 20 101 1918 2012 1918 1919 bottom-third 1911,1941,1963,1978,1993 18 43.1 44.5 -1.4 66 50 1918 2017 1919 1920 normal 1947,1977,1983 24 47.8 49.4 -1.6 43 72 1918 2017 1919 1903 normal 1901,1953,1962,1964,1966,1983 36 46.3 49.3 -3.0 5 106 1918 2013 1919 1917 bottom-tenth 1905,1979 48 46.3 49.4 -3.1 3 104 1918,1919 2002,2013 1919 1905 bottom-tenth 1926,1927 60 46.3 49.3 -3.0 1 103 1920 2002 1920 1919 lowest