1991-2020 Degrees Fahrenheit 1 59.4 55.5 3.9 62 5 1979 1952 1997 1971 top-tenth 2 56.1 55.7 0.4 41 26 1984 2022 1997 1995 normal 1965,1969 3 57.8 58.3 -0.5 28 39 1977 2022 1997 1996 normal 1978 4 61.6 62.4 -0.8 23 44 1977 2022 1997 1996 normal 5 66.6 66.6 0.0 36 31 1977 2022 1997 1995 normal 6 70.6 70.5 0.1 44 23 1977 2022 1997 1995 normal 1953,1971 7 73.3 73.2 0.1 44 23 1977 1952 1997 1995 normal 1965 8 74.6 75.0 -0.4 31 36 1977 1952 1994 1997 normal 1964,1966,1994,2018 9 75.0 75.8 -0.8 19 48 1977 1952 1993 1997 bottom-third 1974,2005 10 74.3 75.7 -1.4 7 59 1977 2012,2023 1988 1997 bottom-tenth 1967,1972 11 73.7 75.0 -1.3 11 55 1977 2012 1993 1997 bottom-third 1972,1991,1993 12 72.3 73.8 -1.5 11 54 1977 2012 1988 1997 bottom-third 1966 18 71.3 72.6 -1.3 9 56 1977 2023 1988 1997 bottom-third 1970 24 73.0 73.8 -0.8 23 40 1977 2013 1994 1997 normal 2009,2015 36 73.1 73.7 -0.6 23 38 1977 2001 1994 1997 normal 1991,1992,1994,2005 48 73.4 73.7 -0.3 34 25 1979 2002 1996 1997 normal 1995,1996,2005 60 73.4 73.7 -0.3 33 24 1977 2003,2013,2020,2021,2023 1997 1997 normal 1996,1997,2009,2011