1901-2000 Degrees Fahrenheit 1 25.8 33.2 -7.4 2 127 1933 2006 1904 1903 bottom-tenth 2 33.5 39.2 -5.7 1 128 1904 1963 1904 1903 lowest 3 39.9 44.8 -4.9 1 128 1904 2011 1904 1903 lowest 4 45.2 49.5 -4.3 1 128 1904 2011,2021 1904 1903 lowest 5 49.1 52.7 -3.6 1 128 1904 2011 1904 1903 lowest 6 51.0 54.1 -3.1 1 128 1904 2005 1904 1903 lowest 7 51.8 53.9 -2.1 4 125 1907,1917 2011 1903 1903 bottom-tenth 1903,1925 8 50.0 52.1 -2.1 4 125 1907 2011 1904 1903 bottom-tenth 9 47.2 49.3 -2.1 5 124 1926 2012 1904 1903 bottom-tenth 10 43.4 46.1 -2.7 4 125 1926 2012 1904 1903 bottom-tenth 11 40.1 43.3 -3.2 1 128 1904 2012 1904 1903 lowest 12 38.0 41.3 -3.3 1 127 1904 2012 1904 1903 lowest 18 42.5 45.6 -3.1 1 127 1904 2012 1904 1903 lowest 24 39.4 41.3 -1.9 3 124 1905 2017 1904 1903 bottom-tenth 36 39.9 41.3 -1.4 5 121 1905 2012 1904 1903 bottom-tenth 48 40.1 41.3 -1.2 8 117 1907 2013 1904 1903 bottom-tenth 60 40.4 41.3 -0.9 11 113 1907 2013 1904 1903 bottom-tenth 1928