1991-2020 Degrees Fahrenheit 1 27.9 29.0 -1.1 74 56 1937 1986 1951 1941 normal 2 25.9 28.6 -2.7 36 93 1979 1934,1981 1950 1951 bottom-third 1975 3 28.2 31.0 -2.8 25 103 1979 1934 1949 1951 bottom-third 4 32.0 34.8 -2.8 20 108 1917 1934 1949 1951 bottom-third 5 36.5 39.7 -3.2 16 112 1962 1934 1949 1951 bottom-third 1910,1916 6 41.2 44.4 -3.2 16 112 1917 2022 1949 1951 bottom-third 1984 7 44.8 48.0 -3.2 15 113 1917 2022 1949 1951 bottom-third 1909 8 46.0 49.9 -3.9 11 117 1916,1917 2022 1930 1951 bottom-tenth 9 46.5 50.1 -3.6 11 117 1916 2022 1930 1951 bottom-tenth 1924,1973,1984,1985 10 45.6 49.3 -3.7 11 117 1917 2022 1930 1951 bottom-tenth 11 44.0 48.2 -4.2 7 121 1913 2013 1930 1951 bottom-tenth 1917,1921,1984 12 42.9 46.6 -3.7 13 115 1913 2018 1930 1951 bottom-tenth 1929 18 43.1 45.9 -2.8 19 107 1918 1935,2018 1930 1949 bottom-third 1906,1924,1979 24 43.7 46.6 -2.9 22 104 1914 2018 1931 1949 bottom-third 1898,1906,1908,1986 36 -99 46.6 -99 -99 -99 1918 2018 normal 48 -99 46.6 -99 -99 -99 1916 2019 normal 60 -99 46.5 -99 -99 -99 1917 2019 normal