1991-2020 Degrees Fahrenheit 1 35.2 41.6 -6.5 24 93 1912 2012 1970 1979 bottom-third 2 33.8 37.0 -3.2 35 81 1912 2017 1978 1979 bottom-third 2023 3 30.7 34.7 -4.0 26 88 1912 1986 1979 1977 bottom-third 1930,1962,1969 4 31.9 33.7 -1.8 53 60 1912 2000 1979 1977 normal 1897,2013 5 32.5 34.9 -2.4 40 73 1912 2000 1979 1977 normal 2019 6 36.1 37.7 -1.6 47 66 1912 2000 1979 1977 normal 1926,1940,1977 7 40.6 41.7 -1.1 50 61 1912 2016 1979 1976 normal 1923,1974,2014 8 44.5 45.7 -1.2 45 66 1912 2016 1979 1976 normal 1951 9 48.0 49.1 -1.1 46 65 1912 2016 1979 1976 normal 1923,1959,1998 10 50.1 51.2 -1.1 45 65 1912 1935 1979 1977 normal 1944,1977,2019 11 50.7 52.0 -1.3 37 72 1912 1935 1979 1977 normal 1966,1990 12 50.7 51.7 -1.0 40 69 1912 1935 1979 1978 normal 1947,1965,1990 18 45.3 47.1 -1.8 19 88 1916 1935 1979 1978 bottom-third 1950,1962,1984 24 50.4 51.7 -1.3 25 81 1917 1935 1974 1979 bottom-third 1922,1928,1963,1973 36 50.6 51.7 -1.1 31 73 1917,1918 2017 1979 1979 bottom-third 1951,1969,1979,1993 48 50.6 51.7 -1.1 28 74 1918 2018 1975 1979 bottom-third 1950,1963,1998 60 51.0 51.7 -0.7 43 57 1925 2017 1979 1978 normal 1934,1978,1981,1984