1991-2020 Degrees Fahrenheit 1 63.0 70.7 -7.7 3 111 1928 1956 1915 1914 bottom-tenth 2 57.8 65.1 -7.3 1 112 1915 1934 1915 1914 lowest 3 55.6 59.8 -4.2 8 104 1983 1934 1907 1914 bottom-tenth 4 48.3 55.3 -7.0 1 111 1915 2012 1915 1914 lowest 5 45.2 50.7 -5.5 1 110 1915 2012 1915 1914 lowest 6 41.5 47.3 -5.8 1 109 1915 2012 1915 1914 lowest 7 38.5 44.9 -6.4 1 108 1915 1934,2012 1915 1897 lowest 8 39.1 44.2 -5.1 2 107 1917 1934 1915 1897 bottom-tenth 1984,1993 9 40.6 45.1 -4.5 3 106 1917 1934 1915 1897 bottom-tenth 1984 10 43.2 47.1 -3.9 4 103 1917 1934 1915 1915 bottom-tenth 11 46.0 49.5 -3.5 4 103 1917 1934 1915 1915 bottom-tenth 1929 12 48.3 51.7 -3.4 5 102 1993 2012 1915 1915 bottom-tenth 1916 18 47.6 50.2 -2.6 10 97 1916 1935,2016 1915 1915 bottom-tenth 1983,1994 24 -99 51.7 -99 -99 -99 1917 1935 normal 36 -99 51.7 -99 -99 -99 1917 2017 normal 48 -99 51.7 -99 -99 -99 1918 2018 normal 60 -99 51.7 -99 -99 -99 1930 2006 normal