1991-2020 Degrees Fahrenheit 1 22.7 36.9 -14.2 4 126 1924 2012 1906 1905 bottom-tenth 2 25.7 33.1 -7.4 10 120 1899 2017 1903 1905 bottom-tenth 3 27.1 31.7 -4.6 29 101 1899 1986 1905 1904 bottom-third 1944 4 27.0 30.8 -3.8 23 106 1899 1934 1903 1905 bottom-third 1939,1952,1973 5 28.8 31.8 -3.0 30 98 1899 1934 1903 1905 bottom-third 1898,1915 6 30.6 34.2 -3.6 14 114 1899 1934 1903 1905 bottom-third 1903,1933,1973 7 34.4 37.8 -3.4 16 112 1899 1934 1903 1905 bottom-third 1973 8 38.4 41.6 -3.2 18 110 1899 1934,2017 1903 1905 bottom-third 9 41.1 44.7 -3.6 11 117 1899 2017 1903 1905 bottom-tenth 1897 10 43.0 46.5 -3.5 13 115 1899 2017 1903 1905 bottom-tenth 1916 11 43.3 47.0 -3.7 8 120 1899 2017 1899 1905 bottom-tenth 1916,1930 12 42.7 46.6 -3.9 6 122 1899 2017 1899 1905 bottom-tenth 1924 18 39.3 42.5 -3.2 11 115 1913 1935 1900 1905 bottom-tenth 24 43.1 46.6 -3.5 9 117 1913 2017 1900 1905 bottom-tenth 36 43.5 46.6 -3.1 10 114 1914 2017,2018 1901 1905 bottom-tenth 1910,1913,1931 48 43.4 46.6 -3.2 8 114 1899,1915,1919 2018 1900 1905 bottom-tenth 60 43.7 46.5 -2.8 13 107 1917 2019 1903 1905 bottom-third 1907,1910,1915,1930