1991-2020 Degrees Fahrenheit 1 35.4 28.9 6.5 95 3 1934 2017 1983 1984 top-tenth 2 28.5 28.6 -0.1 61 37 2015 2017 1982 1983 normal 1976 3 27.5 30.4 -2.9 30 67 1936 1932 1982 1983 bottom-third 1938,2010 4 32.0 33.7 -1.7 43 54 1977 2002 1982 1983 normal 1952,1987 5 36.5 37.8 -1.3 51 46 1977 2017 1982 1983 normal 1989 6 41.4 42.3 -0.9 60 37 1977 2017 1982 1983 normal 1969 7 45.9 46.5 -0.6 66 31 1977 2017 1982 1983 top-third 8 49.3 49.7 -0.4 67 30 1977 2017 1982 1983 top-third 9 51.3 51.8 -0.5 66 31 1977 2017 1982 1983 top-third 10 51.7 52.5 -0.8 64 33 1977 2017 1982 1983 normal 1971,1972,2007 11 51.1 52.0 -0.9 59 38 1977 2017 1982 1983 normal 1989,1998 12 50.1 50.7 -0.6 63 34 1927 2017 1982 1983 normal 1953,1986 18 48.2 47.8 0.4 80 15 1941,1979 2017 1983 1950 top-third 2002,2007 24 50.2 50.6 -0.4 70 25 1928 2017 1983 1975 top-third 1933,1975,1988,1989,1991 36 49.5 50.6 -1.1 50 43 1929 2018,2023 1983 1976 normal 1974,1975,1987,2005 48 49.2 50.6 -1.4 36 55 1930 2023 1983 1977 normal 1932,1934,1935,1996 60 49.1 50.5 -1.4 33 56 1931 2020,2023 1983 1978 normal 1935,1952,1955,1958,1974,1977,1985