1901-2000 Degrees Fahrenheit 1 29.2 30.6 -1.4 49 80 1960 2012 1904 1903 normal 1924 2 21.4 25.7 -4.3 15 114 2015 2012 1904 1903 bottom-third 3 19.4 23.7 -4.3 10 119 2015 2012 1904 1903 bottom-tenth 4 18.9 24.0 -5.1 3 125 1904 2012 1904 1903 bottom-tenth 5 21.5 26.4 -4.9 3 125 1904 2012 1904 1903 bottom-tenth 6 25.3 30.0 -4.7 2 126 1918 2012 1904 1904 bottom-tenth 1904 7 29.9 34.2 -4.3 2 126 1918 2012 1905 1904 bottom-tenth 8 34.1 38.2 -4.1 3 125 1918 2012 1904 1903 bottom-tenth 9 37.8 41.5 -3.7 3 125 1904 2012 1904 1903 bottom-tenth 10 40.4 43.7 -3.3 3 125 1904 2012 1904 1903 bottom-tenth 11 42.0 44.7 -2.7 3 125 1918 2012 1904 1903 bottom-tenth 12 41.7 44.5 -2.8 3 125 1918 2012 1904 1903 bottom-tenth 18 36.3 39.7 -3.4 1 126 1905 2013,2017 1905 1904 lowest 24 41.6 44.5 -2.9 1 126 1905 2013 1905 1904 lowest 36 42.8 44.5 -1.7 2 124 1906 2013 1905 1904 bottom-tenth 1918 48 43.3 44.5 -1.2 5 120 1907 2013 1905 1904 bottom-tenth 1927,1928 60 43.6 44.5 -0.9 9 115 1908 2020 1905 1904 bottom-tenth 1909,1919