1901-2000 Degrees Fahrenheit 1 35.0 28.3 6.7 119 10 1983 2015 2000 1982 top-tenth 1959,2019 2 42.6 34.3 8.3 126 3 2000 1931 2000 1931 top-tenth 3 46.2 41.0 5.2 126 3 1976 1931 2000 1931 top-tenth 4 50.7 47.3 3.4 121 8 1976 1931 2000 1998 top-tenth 5 55.4 52.5 2.9 120 9 1976 1931 2000 1998 top-tenth 1938 6 58.9 56.5 2.4 119 10 1976 1931 2000 1998 top-tenth 7 60.5 58.6 1.9 113 16 1976 1931 2000 1998 top-third 2011 8 60.9 59.1 1.8 113 16 1917 1931 2000 1998 top-third 1956 9 60.5 58.2 2.3 120 9 1917 1931 2000 1998 top-tenth 10 58.1 56.3 1.8 112 17 1917 2012 2000 1998 top-third 11 55.3 53.7 1.6 111 18 1917 2012 2000 1999 top-third 1922 12 52.8 51.2 1.6 106 23 1917 2012 2000 1999 top-third 18 53.2 53.0 0.2 74 54 1904 2012 1997 2000 normal 1896,1936,1947,1984 24 52.2 51.2 1.0 98 30 1979 2017 1997 2000 top-third 1956 36 52.5 51.2 1.3 110 17 1905 2017 1998 2000 top-third 1940,1956,2013 48 53.0 51.2 1.8 123 3 1905 1934 2000 1934 top-tenth 2018 60 52.5 51.2 1.3 118 7 1905 1934 2000 1957 top-tenth 1957,2006,2007