1991-2020 Degrees Fahrenheit 1 53.2 58.1 -4.9 7 73 1948 2015 1973 1990 bottom-tenth 1973 2 55.6 57.5 -1.9 31 49 1949 2015 1990 1988 normal 1961 3 55.6 57.3 -1.7 35 45 1949 2015 1990 1988 normal 1987 4 55.4 57.1 -1.7 33 47 1949 2015 1989 1990 normal 1961,1982 5 56.8 57.9 -1.1 39 41 1949 2015 1989 1990 normal 6 58.6 59.3 -0.7 48 32 1949 2015 1990 1988 normal 1968,1987 7 60.2 60.6 -0.4 56 24 1949 2015 1990 1988 top-third 1968,1986,1988,2000,2023 8 61.1 61.7 -0.6 49 31 1949 2015 1990 1986 normal 2006 9 62.1 62.5 -0.4 59 20 1949 2015 1990 1986 top-third 1977,1978,1986,1993,1994,2004 10 62.4 62.7 -0.3 61 18 1949 2015 1990 1984 top-third 1977,1995,2008,2010 11 62.3 62.7 -0.4 56 23 1949 2015 1990 1984 top-third 1977,2008 12 62.2 62.5 -0.3 60 19 1949 2015 1990 1984 top-third 1959,1984,2010 18 60.9 61.4 -0.5 57 22 1949 2015 1990 1985 top-third 1985,2004 24 61.8 62.4 -0.6 52 26 1950 2016 1990 1986 top-third 1986 36 61.3 62.4 -1.1 36 41 1950,1951 2016 1990 1988 normal 1983 48 61.4 62.3 -0.9 39 37 1952 2018 1990 1988 normal 60 61.3 62.3 -1.0 33 42 1952,1953 2018 1990 1990 normal 1983,1989,1990,1992