1901-2000 Degrees Fahrenheit 1 54.0 55.3 -1.3 40 90 1907 1896 1897 1896 bottom-third 2 49.6 50.0 -0.4 56 74 1960 2012 1897 1896 normal 2019 3 44.9 44.9 0.0 61 69 1899 2012 1895 1896 normal 4 41.0 41.5 -0.5 51 79 1978 2012 1895 1896 normal 1934 5 40.4 40.1 0.3 66 63 1978 2012 1897 1896 normal 1945 6 41.2 40.9 0.3 66 63 1912 2012 1897 1896 normal 7 43.0 43.2 -0.2 46 83 1899,1978 2012 1896 1897 normal 1901,1917,1959,1975,1988 8 46.0 46.5 -0.5 38 91 1918 2017 1897 1896 bottom-third 1900,1917,1929 9 49.4 49.8 -0.4 38 91 1918 2017 1897 1896 bottom-third 1913,1915,1916,1929,1947 10 52.2 52.6 -0.4 36 93 1918 2012 1897 1896 bottom-third 1913,1924,1928,1930,1944,1947,1959,1973,1994 11 54.1 54.5 -0.4 41 88 1918 2012,2017 1897 1896 bottom-third 1924,1952,1971,1994 12 55.4 55.4 0.0 54 75 1918 2012,2017 1896 1897 normal 1900,1956,1985,1990,2009 18 50.8 50.5 0.3 68 60 1905,1979 2017 1897 1897 normal 1973 24 55.4 55.4 0.0 54 74 1978 2017 1897 1897 normal 1909,1916,1947,1965,1981 36 -99 55.4 -99 -99 -99 1979 2018 normal 48 -99 55.3 -99 -99 -99 1980 2019 normal 60 -99 55.3 -99 -99 -99 1980,1981 2020 normal