1991-2020 Degrees Fahrenheit 1 68.1 64.6 3.5 89 7 1953 2015 1976 1969 top-tenth 2 60.5 61.3 -0.8 50 46 1953 2015 1976 1973 normal 1937,1951 3 57.8 57.5 0.3 67 29 2011 1992 1976 1969 top-third 1993 4 53.9 54.2 -0.3 59 37 1955 2015 1976 1969 normal 1998 5 51.0 51.0 0.0 67 29 1955 2015 1976 1968 top-third 1988 6 46.6 48.3 -1.7 40 56 1950 1934 1976 1974 normal 1973,1984,2022 7 44.6 46.2 -1.6 37 58 1950 1934 1975 1976 normal 1945,1963,1964,1996 8 44.1 45.5 -1.4 35 60 1950 1934 1976 1976 normal 1954,1970,1976 9 44.8 46.2 -1.4 34 61 1950 1934 1975 1976 normal 1951 10 46.8 47.9 -1.1 43 52 1950 2015 1976 1974 normal 2008,2009 11 48.6 50.1 -1.5 34 61 1950 2015 1976 1975 normal 12 50.4 52.0 -1.6 33 62 1950 2015 1975 1976 normal 1975 18 49.0 50.8 -1.8 29 66 1930,1950 2016 1976 1975 bottom-third 1963,1981 24 50.6 52.0 -1.4 36 58 1950 2016 1976 1976 normal 1942,1966,1976,1981,1994 36 50.5 52.0 -1.5 29 64 1950 2016 1975 1976 bottom-third 1943,1946,1953,1954 48 50.7 52.0 -1.3 41 51 1932,1950,1952 2016 1976 1971 normal 1934,1935,1964 60 50.5 52.0 -1.5 31 60 1933 2016,2018 1975 1976 normal 1939,1947,1963,1965,1966