1991-2020 Degrees Fahrenheit 1 77.9 80.2 -2.3 17 84 1989 2011 1941 1954 bottom-third 1961 2 76.2 76.1 0.1 62 39 1907 2011 1954 1953 normal 3 73.2 71.6 1.6 87 14 1973 2011 1954 1953 top-third 2018 4 68.3 67.4 0.9 84 17 1931 2011 1954 1953 top-third 2017 5 63.6 63.2 0.4 74 26 1958,1983 2012 1954 1954 top-third 1954 6 60.0 59.8 0.2 74 26 1979 2012 1954 1953 top-third 1999,2005 7 57.8 57.4 0.4 79 21 1979 2012 1954 1953 top-third 1925,2005 8 57.3 56.8 0.5 81 18 1973 2012 1954 1953 top-third 1991 9 58.4 57.7 0.7 84 15 1973 2017 1954 1934 top-third 1925,1999 10 60.7 59.6 1.1 88 11 1973 2017 1954 1934 top-third 1934 11 63.2 61.8 1.4 91 8 1973 2012 1954 1955 top-tenth 12 65.3 63.7 1.6 95 4 1973 2012 1954 1955 top-tenth 2011,2016 18 63.5 62.4 1.1 94 5 1979 2012 1954 1955 top-tenth 2006 24 64.5 63.7 0.8 92 6 1978 2012 1954 1953 top-tenth 1935,1953,1956 36 64.6 63.7 0.9 92 5 1979 2013 1954 1955 top-tenth 2000,2001 48 64.5 63.7 0.8 93 3 1980 2014 1954 1955 top-tenth 2012,2018,2019 60 63.9 63.6 0.3 79 16 1979 2012,2020 1954 1955 top-third 2021