1991-2020 Degrees Fahrenheit 1 38.8 42.2 -3.5 31 97 1977 1950 1982 1980 bottom-third 1963 2 43.3 43.4 -0.1 70 58 1918 1932 1982 1980 normal 1944,1960 3 46.3 46.0 0.3 85 43 1918 1932 1982 1980 normal 1928,1942,1952,1954,1973 4 49.9 49.9 0.0 77 50 1918 1932 1982 1980 normal 1913,1980 5 53.8 54.3 -0.5 58 69 1918 1932 1982 1980 normal 1897,1921,1979,1986,2018 6 57.3 58.3 -1.0 46 81 1918 1932 1982 1980 normal 1948,1966,1986,1987 7 60.1 61.3 -1.2 43 84 1918 1932 1982 1980 normal 1917,1961,1966,1967,1980 8 61.8 63.1 -1.3 32 95 1918,1977 1932 1982 1981 bottom-third 1917,1936,1956,1981 9 62.8 63.7 -0.9 48 79 1918 1932,2017 1982 1978 normal 1917,1956,1988,1989 10 62.1 63.4 -1.3 29 98 1977 2017 1982 1981 bottom-third 1938,1967,1973,1981,2010 11 61.3 62.4 -1.1 40 87 1918 2017 1982 1980 bottom-third 1911,1913,1916,1930,1964,1988 12 60.0 61.0 -1.0 52 75 1918 2017 1982 1978 normal 1966 18 58.1 60.0 -1.9 11 114 1905 2017 1982 1982 bottom-tenth 1902,1982 24 59.5 60.9 -1.4 23 102 1903 2017 1982 1979 bottom-third 1914,1995 36 59.3 60.9 -1.6 13 110 1904 2018,2019 1982 1980 bottom-third 1979,1985,1995 48 59.3 60.9 -1.6 11 110 1905 2020 1982 1981 bottom-tenth 1908,1919,1921,1971 60 59.3 60.8 -1.5 11 108 1906 2020 1981 1982 bottom-tenth 1919,1981