1991-2020 Degrees Fahrenheit 1 94.0 94.3 -0.3 37 30 1955 2006 1994 1989 normal 2 89.9 91.5 -1.6 23 44 1965 2006,2021 1993 1994 normal 3 85.0 87.6 -2.6 11 56 1965 2006 1991 1994 bottom-third 1967 4 81.2 83.8 -2.6 14 53 1975 2021 1991 1994 bottom-third 1977 5 78.2 80.3 -2.1 21 46 1975 2017 1991 1994 bottom-third 6 76.1 77.0 -0.9 28 39 1975 2016,2017 1991 1994 normal 1958,1968,1985,1990 7 73.3 74.1 -0.8 32 33 1955,1975 2014 1991 1994 normal 1958 8 70.8 71.9 -1.1 25 37 1975 1996,2014 1991 1994 normal 1957,1980,2011 9 69.4 71.0 -1.6 16 46 1975 1996 1991 1994 bottom-third 1963,1966,1970,1972,1988 10 69.8 71.6 -1.8 17 44 1975 1996 1991 1994 bottom-third 1974,1987 11 71.6 73.1 -1.5 20 41 1973 1996 1991 1994 bottom-third 1956,1958,1963,1986,1988 12 73.5 74.9 -1.4 25 36 1973 1996 1991 1994 normal 1963 18 74.7 75.6 -0.9 30 31 1965,1976 2018 1991 1994 normal 24 73.9 74.9 -1.0 27 29 1973,1974 2017,2018 1992 1994 normal 1998 36 73.9 74.9 -1.0 24 27 1975 2018 1993 1994 normal 1959,1991,1993 48 74.2 74.9 -0.7 28 18 1976 2018 1994 1995 normal 60 73.9 74.8 -0.9 22 19 1977 2018 1991 1994 normal