1901-2000 Degrees Fahrenheit 1 24.6 21.3 3.3 87 43 1936 1991 1940 1935 top-third 1973 2 23.2 19.1 4.1 96 34 1936 1992 1940 1934 top-third 3 24.1 19.6 4.5 105 24 1949 1992 1940 1934 top-third 4 23.7 22.1 1.6 78 51 1979 2000 1939 1940 normal 5 28.5 26.3 2.2 93 36 1979 2000 1940 1935 top-third 6 33.7 30.9 2.8 107 22 1979 2016 1940 1934 top-third 2013 7 38.3 35.6 2.7 109 20 1979 2016 1940 1934 top-third 1944 8 42.0 39.4 2.6 112 17 1979 1999 1940 1934 top-third 1998 9 44.1 41.5 2.6 114 15 1979 2016 1940 1934 top-third 1998 10 45.1 42.4 2.7 122 7 1917,1979 2016 1940 1934 top-tenth 11 44.5 42.2 2.3 115 14 1917 2016 1940 1935 top-third 1988,2000,2006 12 43.6 41.1 2.5 114 15 1952 2016 1940 1935 top-third 1964,1988 18 39.9 37.7 2.2 111 17 1917 2016 1940 1935 top-third 24 43.1 41.1 2.0 113 15 1952 2017 1940 1935 top-third 2005 36 42.8 41.1 1.7 110 17 1918 2017 1940 1941 top-third 1991,2004,2013,2022 48 42.7 41.1 1.6 110 16 1952 2008,2016 1940 1941 top-third 1989,2003 60 42.3 41.1 1.2 101 24 1952 2008,2017 1940 1935 top-third 1995,2023