1991-2020 Degrees Fahrenheit 1 26.0 19.8 6.2 69 6 1983 2020 1985 1979 top-tenth 2 24.8 24.8 0.0 44 31 1955 1999 1985 1981 normal 3 31.4 31.1 0.3 48 27 1951 1999 1985 1980 normal 4 36.3 37.8 -1.5 31 44 1951 2021 1985 1982 normal 5 42.1 43.8 -1.7 22 53 1951 2021 1985 1982 bottom-third 1966 6 46.1 48.0 -1.9 18 57 1951 2021 1985 1983 bottom-third 7 48.9 50.0 -1.1 26 48 1951 2021 1985 1981 normal 2008,2014 8 49.4 50.3 -0.9 28 46 1951 2021 1985 1981 normal 1959,1970,2008,2014 9 48.4 49.3 -0.9 32 42 1951 1988 1985 1981 normal 2008 10 47.4 47.4 0.0 50 24 1951 2021 1985 1981 top-third 11 44.3 44.8 -0.5 42 32 1951 1987 1985 1984 normal 1961 12 42.5 42.4 0.1 51 23 1950 1987 1985 1981 top-third 1953 18 42.4 44.3 -1.9 23 50 1951 2012,2021 1985 1984 bottom-third 24 41.1 42.4 -1.3 31 41 1951 1988 1985 1985 normal 1985,1993 36 41.6 42.3 -0.7 40 30 1951 1988 1985 1982 normal 1977,1982 48 41.8 42.4 -0.6 42 26 1952 1990 1985 1983 normal 1983,1994 60 41.0 42.4 -1.4 25 41 1953 1991 1982 1985 normal 1962,1965,1978