1901-2000 Degrees Fahrenheit 1 24.7 27.2 -2.5 30 100 1918 2023 1896 1901 bottom-third 2 27.2 29.1 -1.9 31 98 1918 2016 1897 1901 bottom-third 1912 3 29.7 33.2 -3.5 9 120 1918 2016 1902 1901 bottom-tenth 4 35.1 37.9 -2.8 7 122 1918 2016 1902 1901 bottom-tenth 5 40.7 42.7 -2.0 12 117 1918 2016 1902 1901 bottom-tenth 1963 6 45.4 47.0 -1.6 15 114 1918 2016 1902 1901 bottom-third 1935 7 49.2 50.4 -1.2 22 107 1905,1918 2016 1902 1901 bottom-third 1959 8 51.2 52.2 -1.0 24 105 1904 2023 1898 1901 bottom-third 1897,1915,1935,1936,1965 9 51.5 52.6 -1.1 17 112 1918 2016,2023 1898 1901 bottom-third 1898,1936,1940 10 50.7 51.9 -1.2 15 114 1918 2023 1902 1901 bottom-third 1910,1912 11 49.2 50.5 -1.3 15 114 1918 2023 1902 1901 bottom-third 1907,1910 12 46.9 48.6 -1.7 9 120 1918 2023 1902 1901 bottom-tenth 1917,1968 18 47.2 48.0 -0.8 18 110 1905 2013,2017 1898 1901 bottom-third 1907,1923,1964 24 47.7 48.5 -0.8 21 107 1918 2023 1897 1901 bottom-third 1897,1916,1964 36 47.7 48.5 -0.8 18 109 1906 2023 1898 1901 bottom-third 1898,1903,1928,1937,1941,1942 48 48.0 48.5 -0.5 30 96 1908 2023 1899 1901 bottom-third 1899,1914,1923,1924 60 47.9 48.5 -0.6 21 104 1908 2023 1902 1901 bottom-third 1903,1913,1914,1916,1917,1924,1930,1938