1901-2000 Degrees Fahrenheit 1 19.9 23.7 -3.8 21 109 1937 1986 1898 1912 bottom-third 2 20.5 24.5 -4.0 15 114 1979 1981 1912 1911 bottom-third 3 25.1 27.5 -2.4 17 112 1973 2018 1912 1911 bottom-third 1929 4 29.9 32.3 -2.4 12 117 1899 2018 1912 1911 bottom-tenth 1919,1932 5 34.1 37.3 -3.2 6 123 1899 2022 1899 1912 bottom-tenth 6 39.0 41.9 -2.9 2 127 1899 2022 1899 1912 bottom-tenth 1917,1930,1973 7 42.7 45.5 -2.8 1 128 1913 2022 1913 1912 lowest 8 44.6 47.5 -2.9 1 128 1913 2022 1913 1912 lowest 9 45.3 48.0 -2.7 1 128 1913 2022 1913 1912 lowest 10 44.7 47.4 -2.7 1 128 1913 2022 1913 1912 lowest 11 43.2 46.2 -3.0 1 128 1913 2013 1913 1912 lowest 12 41.7 44.6 -2.9 1 128 1913 2018 1913 1912 lowest 18 40.9 43.7 -2.8 1 127 1913 1935 1913 1912 lowest 24 42.7 44.6 -1.9 3 125 1914,1925 2018 1913 1912 bottom-tenth 1930 36 44.0 44.6 -0.6 22 105 1914 2018 1910 1912 bottom-third 1905,1985 48 43.7 44.5 -0.8 11 115 1916 2019 1900 1912 bottom-tenth 1900,1926 60 43.8 44.5 -0.7 11 114 1917 2019 1900 1912 bottom-tenth 1922,1932