1901-2000 Degrees Fahrenheit 1 50.3 48.4 1.9 84 46 1960 2012 1902 1903 normal 1987,2009 2 45.1 44.3 0.8 71 59 1947 2012 1902 1903 normal 1977 3 41.6 41.9 -0.3 55 75 1978 2012 1902 1903 normal 1983 4 39.5 41.3 -1.8 29 100 1978 2012 1902 1903 bottom-third 5 40.4 42.5 -2.1 23 106 1978 2012 1902 1903 bottom-third 2010 6 43.4 45.2 -1.8 22 107 1977 2017 1902 1903 bottom-third 1979 7 47.0 48.8 -1.8 17 112 1977 1932,2017 1902 1903 bottom-third 1915,2010,2014 8 50.7 52.2 -1.5 18 111 1977 2017 1902 1903 bottom-third 1915,1980 9 53.7 55.0 -1.3 21 108 1977 2017 1902 1903 bottom-third 10 55.2 56.9 -1.7 11 118 1977 2017 1902 1903 bottom-tenth 1963,2014 11 56.3 57.7 -1.4 13 116 1977 2017 1902 1903 bottom-tenth 1993,2010 12 56.3 57.7 -1.4 10 119 1977 2017 1902 1903 bottom-tenth 1962,1980,1984 18 53.2 53.5 -0.3 36 92 1978 2017 1903 1901 bottom-third 1915,1948,1983 24 57.6 57.7 -0.1 45 83 1978 2017 1903 1901 normal 1911,1931,1940,1951,1958,1995 36 56.9 57.7 -0.8 15 112 1979 2018 1904 1903 bottom-third 1981,1982 48 57.4 57.7 -0.3 31 95 1980 2020 1902 1903 bottom-third 1908,1919,1986,1997,1998 60 57.5 57.7 -0.2 33 92 1981 2020 1904 1903 bottom-third