1991-2020 Degrees Fahrenheit 1 35.4 34.2 1.2 50 28 1983 2021 1992 1991 normal 2 37.7 39.3 -1.6 28 50 2000 2021 1992 1991 normal 1966,2014 3 43.3 45.3 -2.0 19 59 1976 2021 1989 1992 bottom-third 1995 4 48.5 51.4 -2.9 10 68 1976 2021 1989 1992 bottom-third 5 54.5 56.7 -2.2 15 63 1985 2021 1992 1991 bottom-third 1969 6 58.5 60.6 -2.1 13 64 1976 1954 1992 1991 bottom-third 7 60.7 62.8 -2.1 15 62 1976 1954 1992 1991 bottom-third 8 61.1 63.2 -2.1 14 63 1961,1976 1998 1992 1991 bottom-third 9 59.9 62.3 -2.4 9 68 1961 1954 1992 1991 bottom-third 1989 10 58.1 60.7 -2.6 7 70 1951,1961 2012 1976 1992 bottom-tenth 1972 11 55.6 58.4 -2.8 8 69 1951 2012 1989 1992 bottom-tenth 1958 12 53.2 56.1 -2.9 8 69 1979 2012 1985 1992 bottom-tenth 1950,1972 18 54.7 57.6 -2.9 3 73 1951 2012 1979 1992 bottom-tenth 24 54.3 56.1 -1.8 23 53 1979 2012 1985 1992 bottom-third 1976,1994 36 55.3 56.1 -0.8 44 31 1961,1962,1980 2012,2017 1986 1992 normal 1965,2015 48 55.6 56.0 -0.4 43 31 1961 2001 1987 1992 normal 1999 60 55.3 56.0 -0.7 39 34 1961,1962 2002 1989 1992 normal 1954,1987,1989