1991-2020 Degrees Fahrenheit 1 65.1 71.6 -6.5 2 74 1974 2003 1974 1992 bottom-tenth 2 63.7 72.4 -8.7 1 75 1993 2003 1993 1992 lowest 3 63.0 69.8 -6.8 1 75 1993 1988,2021 1993 1992 lowest 4 62.1 66.2 -4.1 2 74 1950 1988 1950 1992 bottom-tenth 5 59.0 62.1 -3.1 6 70 1950 1988 1975 1992 bottom-tenth 1995 6 55.8 58.1 -2.3 14 62 1951 2012 1982 1992 bottom-third 7 50.9 54.0 -3.1 9 67 1975 2016 1989 1992 bottom-third 1967 8 46.7 50.6 -3.9 9 67 1950 2016 1982 1992 bottom-third 1949,1957 9 43.7 48.0 -4.3 9 66 1950 2012 1979 1992 bottom-third 10 42.9 46.8 -3.9 9 66 1979 2012 1979 1992 bottom-third 1975 11 43.5 46.9 -3.4 9 66 1979 2012,2016 1979 1992 bottom-third 1972 12 44.9 48.1 -3.2 13 62 1979 2016 1985 1992 bottom-third 1949,1956 18 49.2 51.4 -2.2 18 57 1951 2016 1985 1992 bottom-third 1973,1996 24 47.1 48.1 -1.0 39 35 1979 2016 1990 1992 normal 2002 36 47.5 48.1 -0.6 45 28 1952 2017 1991 1992 normal 1999 48 47.6 48.2 -0.6 45 27 1952 2016 1988 1992 normal 1994 60 47.3 48.2 -0.9 40 31 1953 2016 1989 1992 normal 1999