1991-2020 Degrees Fahrenheit 1 60.5 61.5 -1.0 41 35 1965 2022 1989 1990 normal 2 67.9 66.6 1.3 58 18 1965 2022 1989 1990 top-third 1953,1983 3 69.4 68.9 0.5 52 24 1993 2022 1989 1990 top-third 1948,2009 4 68.1 67.8 0.3 47 29 1993 2021 1989 1990 normal 1970,1996 5 65.4 65.3 0.1 46 30 1965 1988,2021 1989 1990 normal 1953,1958,1963,1977,2009 6 61.8 62.1 -0.3 41 35 1950 2012 1989 1990 normal 1955,1996,2019 7 58.4 58.7 -0.3 45 31 1965 2012 1989 1990 normal 1966,1979,2005 8 56.2 55.0 1.2 63 13 1965 2012 1990 1988 top-third 1998,2013 9 52.3 51.9 0.4 52 24 1950 2012 1989 1990 top-third 1999,2022 10 49.0 49.4 -0.4 40 35 1950 2012 1989 1990 normal 2008 11 48.2 48.2 0.0 44 31 1979 2012 1989 1990 normal 12 48.2 48.2 0.0 41 34 1979 2012 1989 1990 normal 18 53.0 52.9 0.1 52 23 1951 2016 1990 1988 top-third 1958,1998 24 48.5 48.2 0.3 53 21 1979 2016 1990 1988 top-third 2008 36 47.7 48.2 -0.5 39 34 1951 2017 1987 1990 normal 1964,1981,1996 48 48.3 48.3 0.0 53 19 1952 2015 1989 1990 top-third 1963,2005,2022 60 48.6 48.3 0.3 62 9 1972,1973 2016 1990 1991 top-third 1992,2003,2004