1901-2000 Degrees Fahrenheit 1 19.2 19.8 -0.6 52 78 1918 1932 1996 1999 normal 1899,1917,1988 2 23.9 22.2 1.7 77 52 1918 2016 1996 1999 normal 1985 3 30.0 26.9 3.1 105 24 1918 2016 1998 1999 top-third 1924 4 34.2 32.2 2.0 98 31 1918 1932,2002 1998 1999 top-third 1921,1924,1974,1992,1998 5 39.8 37.6 2.2 106 23 1918 1932 1998 1999 top-third 6 44.1 42.3 1.8 101 28 1918 2016 1998 1999 top-third 1921,1953 7 48.0 46.0 2.0 112 17 1918 1932 1998 1999 top-third 1953,2020 8 50.3 48.2 2.1 114 15 1918 1932 1999 1995 top-third 1949 9 51.1 48.9 2.2 114 15 1918 2016 1998 1999 top-third 10 50.4 48.3 2.1 115 14 1918 2016 1998 1999 top-third 1992 11 48.6 46.7 1.9 112 17 1918 2013 1998 1999 top-third 12 46.8 44.5 2.3 114 15 1918 2013 1998 1999 top-third 18 46.2 43.8 2.4 116 12 1905 2013 1998 1999 top-tenth 24 47.3 44.5 2.8 124 4 1918 2013 1999 2000 top-tenth 2022 36 46.5 44.5 2.0 115 12 1927 2013 1999 2000 top-tenth 2002 48 46.0 44.5 1.5 108 18 1918,1927 2013 1999 2000 top-third 2017 60 45.7 44.5 1.2 101 24 1908 2023 1999 1992 top-third 1950,1954,2005