1991-2020 Degrees Fahrenheit 1 42.1 42.6 -0.5 76 54 1920 1981 1905 1895 normal 2 32.3 39.8 -7.5 8 122 1924 2012 1906 1905 bottom-tenth 3 31.1 36.3 -5.2 21 109 1899 1992 1905 1904 bottom-third 4 30.8 34.4 -3.6 43 87 1899 1992 1905 1904 bottom-third 5 29.9 33.2 -3.3 31 98 1899 1981 1905 1904 bottom-third 1897,1928,1945 6 30.9 33.6 -2.7 38 90 1899 2000 1905 1904 bottom-third 1898,1965 7 32.1 35.4 -3.3 19 109 1899 1934,2017 1903 1905 bottom-third 1979 8 35.3 38.4 -3.1 21 107 1899 1934,2017 1903 1905 bottom-third 1914 9 38.7 41.7 -3.0 20 108 1899 2017 1903 1905 bottom-third 1930,1975 10 41.1 44.5 -3.4 14 114 1899 2017 1903 1905 bottom-third 1952 11 42.8 46.1 -3.3 17 111 1899 2017 1905 1904 bottom-third 12 43.1 46.6 -3.5 13 115 1899 2017 1905 1905 bottom-tenth 1905,1973 18 39.0 42.3 -3.3 11 115 1913 2017 1900 1905 bottom-tenth 1916 24 43.1 46.6 -3.5 9 117 1913,1917 2017 1900 1905 bottom-tenth 1985 36 43.5 46.6 -3.1 13 111 1918 2017,2018 1905 1904 bottom-third 1929 48 43.3 46.6 -3.3 9 113 1899,1919 2018 1900 1905 bottom-tenth 60 43.7 46.6 -2.9 16 104 1917 2018,2019 1903 1905 bottom-third 1910,1931