1901-2000 Degrees Fahrenheit 1 13.4 26.2 -12.8 3 127 1937,1949 1953 1930 1929 bottom-tenth 2 23.0 27.2 -4.2 12 117 1949 1934 1929 1928 bottom-tenth 3 26.1 29.6 -3.5 7 122 1949 1934 1929 1929 bottom-tenth 1929 4 31.3 33.7 -2.4 13 116 1949 1934 1929 1928 bottom-tenth 5 35.6 38.1 -2.5 9 120 1949 2015 1920 1929 bottom-tenth 1916 6 40.6 42.3 -1.7 14 115 1949 2015 1929 1928 bottom-third 1932 7 44.0 45.4 -1.4 16 113 1949 2015 1929 1928 bottom-third 8 45.5 46.8 -1.3 14 115 1949 2015,2022 1929 1928 bottom-third 1922 9 45.9 47.2 -1.3 11 118 1917 2015 1920 1929 bottom-tenth 10 45.2 46.7 -1.5 8 121 1917,1949 2015 1917 1929 bottom-tenth 11 44.4 45.7 -1.3 9 120 1949 2016 1917 1929 bottom-tenth 1952,1972,1986 12 42.4 44.4 -2.0 3 126 1949 2016 1917 1929 bottom-tenth 18 41.7 43.7 -2.0 2 126 1917 2016 1917 1929 bottom-tenth 24 43.0 44.4 -1.4 5 123 1913,1950,1957 2016 1913 1929 bottom-tenth 36 43.3 44.4 -1.1 4 123 1914 2017 1914 1929 bottom-tenth 48 44.0 44.4 -0.4 31 95 1915 2018 1925 1929 bottom-third 1901,1903,1905,1907,1979 60 44.3 44.4 -0.1 48 77 1917 2018,2019 1926 1929 normal 1909,1974,1977