1991-2020 Degrees Fahrenheit 1 73.4 73.4 0.0 42 34 1993 2021 1965 1966 normal 2 67.4 69.1 -1.7 16 60 1993 2021 1965 1966 bottom-third 1983 3 61.9 64.5 -2.6 6 70 1950 1988 1950 1966 bottom-tenth 4 56.5 59.8 -3.3 3 73 1950 1988 1950 1966 bottom-tenth 1975,1995 5 51.6 55.5 -3.9 6 70 1951 1988,2012 1965 1966 bottom-tenth 6 48.8 51.2 -2.4 14 62 2019 2016 1965 1966 bottom-third 1993,2002 7 46.3 47.7 -1.4 29 47 1950 2016 1966 1964 normal 1948 8 44.2 45.1 -0.9 35 40 1950,1979 2016 1966 1964 normal 1954,1991,2022 9 43.2 44.2 -1.0 34 41 1979 2000,2016 1966 1964 normal 10 44.0 44.6 -0.6 35 40 1979 2016 1966 1964 normal 1984,1995 11 46.0 46.1 -0.1 43 32 1979 2016 1966 1964 normal 1976,1990,1994 12 47.9 48.2 -0.3 37 38 1979 2016 1966 1964 normal 1976,1990 18 48.7 49.2 -0.5 40 35 1979 2016 1966 1964 normal 1962,2018 24 47.2 48.2 -1.0 26 48 1979 2016 1966 1965 normal 1965,1983,1990 36 46.4 48.2 -1.8 7 66 1952 2017 1952 1966 bottom-tenth 1970 48 47.2 48.3 -1.1 22 50 1952 2015,2016 1965 1966 bottom-third 1958,1986,1998 60 47.4 48.3 -0.9 23 48 1973,1979 2016 1966 1965 bottom-third 1960,1983