1991-2020 Degrees Fahrenheit 1 19.5 17.3 2.2 49 27 1992 2003 1993 1986 normal 2 19.1 17.8 1.3 48 26 1992 1981 1993 1986 normal 3 21.4 22.0 -0.6 33 41 1992 2018 1993 1990 normal 1974 4 26.4 27.5 -1.1 30 44 1992 2018 1993 1990 normal 2007 5 31.8 33.2 -1.4 28 46 1992 2018 1993 1990 normal 6 36.7 38.2 -1.5 25 49 1992 2018 1993 1990 normal 1960,1980 7 40.6 42.1 -1.5 25 49 1992 2018 1993 1990 normal 8 42.9 44.5 -1.6 22 52 1992 2018 1993 1990 bottom-third 1961,2013 9 43.8 45.3 -1.5 24 50 1992 2018 1993 1990 bottom-third 1974 10 43.6 45.0 -1.4 26 48 1992 2018 1993 1990 normal 1960,1971 11 42.7 44.1 -1.4 29 45 1992 2018 1993 1991 normal 1991 12 40.7 42.5 -1.8 27 47 1965 2018 1993 1991 normal 1989 18 38.4 41.1 -2.7 7 65 1993 2018 1993 1991 bottom-tenth 24 39.7 42.5 -2.8 6 66 1993 2018 1993 1992 bottom-tenth 1974,1977,1980 36 39.4 42.4 -3.0 1 69 1976,1994 2018 1976 1993 lowest 1976 48 39.8 42.2 -2.4 4 64 1976 2019 1977 1993 bottom-tenth 60 40.2 42.1 -1.9 4 62 1976 2020,2021,2022 1993 1993 bottom-tenth 1969,1978,1993