1991-2020 Degrees Fahrenheit 1 34.7 35.2 -0.5 52 74 1919 1917 1987 1986 normal 2 38.9 38.4 0.5 81 45 1985 1917 1986 1987 normal 1910,1963 3 45.7 43.1 2.6 118 6 1985 1950 1987 1965 top-tenth 4 50.4 48.8 1.6 110 13 1985 1953 1986 1987 top-third 2001 5 55.2 54.1 1.1 106 17 1985 2012 1987 1981 top-third 1981 6 58.4 57.7 0.7 102 21 1985 2014 1987 1979 top-third 7 59.7 58.9 0.8 108 15 1985 2021 1987 1979 top-third 1950,2004 8 59.6 59.1 0.5 100 23 1916 2021 1986 1987 top-third 1947,1963,1974 9 59.0 58.2 0.8 109 14 1916 2021 1986 1987 top-third 1925,1937,1938,1967,2003 10 57.6 57.0 0.6 102 21 1916 2021 1986 1987 top-third 11 56.1 55.4 0.7 108 15 1916 2015 1986 1987 top-third 1994 12 54.3 53.8 0.5 102 21 1916 2015 1986 1987 top-third 1939 18 55.4 55.1 0.3 102 18 1916 2015 1987 1967 top-third 1990,2014,2020 24 54.5 53.8 0.7 114 6 1917 2016 1987 1987 top-tenth 1926,1940,1987 36 54.4 53.8 0.6 113 5 1913 2016 1987 1988 top-tenth 48 53.2 53.8 -0.6 77 39 1913,1916,1919 2016 1987 1983 normal 1927,1961,1970,1983 60 53.1 53.8 -0.7 73 41 1913,1916,1920 2016 1987 1984 normal 1928,1983,1984,1997