1991-2020 Degrees Fahrenheit 1 46.2 43.5 2.7 56 19 2002 1963 1982 1974 top-third 2 50.7 50.7 0.0 34 41 1951 1963 1982 1979 normal 2008 3 58.8 56.5 2.3 68 7 1951 1963 1982 1963 top-tenth 4 62.0 59.6 2.4 68 7 1993 2021 1982 1963 top-tenth 2007 5 61.7 60.1 1.6 65 9 1993 2021 1982 1963 top-third 1998 6 59.6 58.8 0.8 54 20 1993 1988 1982 1970 top-third 1970,1991,2018 7 56.6 56.3 0.3 46 28 1951 1988 1982 1981 normal 8 53.2 53.0 0.2 45 29 1951 1988 1982 1981 normal 1997,2008 9 50.5 49.2 1.3 57 17 1951 1988 1982 1977 top-third 10 48.0 45.9 2.1 65 9 1950 2012 1982 1983 top-third 1990 11 45.6 43.6 2.0 61 12 1950 2012 1982 1983 top-third 12 43.8 42.4 1.4 60 13 1951 2021 1982 1981 top-third 18 48.3 47.9 0.4 48 24 1951 2021 1982 1981 top-third 24 41.1 42.3 -1.2 31 40 1951 1988 1980 1982 normal 1985 36 42.2 42.3 -0.1 50 19 1951,1952 2022 1982 1983 top-third 2004 48 42.3 42.3 0.0 48 19 1952 1990 1982 1983 top-third 60 41.2 42.4 -1.2 30 35 1953 1991 1982 1978 normal 1978