1991-2020 Degrees Fahrenheit 1 39.6 45.4 -5.8 6 124 1897 1934 1898 1912 bottom-tenth 2 32.8 42.4 -9.6 3 127 1936 1934 1913 1912 bottom-tenth 3 31.1 40.3 -9.2 2 128 1929 1934 1913 1912 bottom-tenth 4 32.5 39.0 -6.5 6 120 1929 1992 1899 1912 bottom-tenth 5 34.3 39.5 -5.2 10 116 1937 1992 1899 1912 bottom-tenth 6 36.6 41.7 -5.1 8 116 1937 2015 1913 1912 bottom-tenth 7 39.7 45.1 -5.4 2 121 1937 2015 1913 1912 bottom-tenth 1917,1929 8 43.2 48.9 -5.7 1 122 1913 2015 1913 1912 lowest 9 46.2 51.9 -5.7 1 122 1913 2015 1913 1912 lowest 10 48.3 53.4 -5.1 2 121 1917 2016 1913 1912 bottom-tenth 11 49.2 54.0 -4.8 2 121 1917 2016 1913 1912 bottom-tenth 12 49.3 53.8 -4.5 2 121 1917 2016 1913 1912 bottom-tenth 18 45.9 49.8 -3.9 2 119 1917 2016 1913 1912 bottom-tenth 24 50.1 53.8 -3.7 2 118 1917 2016 1913 1912 bottom-tenth 36 50.9 53.8 -2.9 3 115 1957 2016,2017 1913 1912 bottom-tenth 1917,1922 48 50.9 53.8 -2.9 1 115 1913 2016 1913 1912 lowest 60 51.1 53.8 -2.7 2 112 1917 2017 1913 1912 bottom-tenth