1901-2000 Degrees Fahrenheit 1 14.0 23.7 -9.7 2 128 1937 1986 1930 1929 bottom-tenth 2 20.9 24.5 -3.6 17 112 1979 1981 1925 1929 bottom-third 1919 3 22.6 27.5 -4.9 3 126 1973 2018 1930 1929 bottom-tenth 4 28.4 32.3 -3.9 3 126 1899 2018 1912 1929 bottom-tenth 1912 5 33.6 37.3 -3.7 2 127 1899 2022 1899 1929 bottom-tenth 6 39.0 41.9 -2.9 2 127 1899 2022 1917 1929 bottom-tenth 1913,1917,1973 7 43.0 45.5 -2.5 4 125 1913 2022 1917 1929 bottom-tenth 1917,1962 8 45.2 47.5 -2.3 3 126 1913 2022 1917 1929 bottom-tenth 9 45.8 48.0 -2.2 4 125 1913 2022 1917 1929 bottom-tenth 10 45.3 47.4 -2.1 2 127 1913 2022 1917 1929 bottom-tenth 1917 11 44.1 46.2 -2.1 3 126 1913 2013 1925 1929 bottom-tenth 1899,1924 12 42.0 44.6 -2.6 2 127 1913 2018 1913 1929 bottom-tenth 18 41.4 43.7 -2.3 2 126 1913 1935 1913 1929 bottom-tenth 24 42.7 44.6 -1.9 3 125 1914,1925 2018 1925 1929 bottom-tenth 1913 36 43.3 44.6 -1.3 4 123 1914 2018 1926 1929 bottom-tenth 1919,1925,1926,1931 48 43.8 44.5 -0.7 14 112 1916 2019 1927 1929 bottom-third 1907,1914,1925,1927,1933 60 44.0 44.5 -0.5 18 107 1917 2019 1928 1929 bottom-third 1901,1907,1908,1924,1927,1976