1901-2000 Degrees Fahrenheit 1 40.6 36.3 4.3 114 15 1976 1913 1933 1931 top-third 2020 2 46.1 42.5 3.6 123 6 1976 1931 1933 1931 top-tenth 3 50.0 48.5 1.5 107 22 1976 1931 1932 1933 top-third 1913,1978,2017 4 55.9 53.5 2.4 125 4 1976 1998 1933 1931 top-tenth 1954 5 59.3 56.7 2.6 124 5 1976 1998 1933 1931 top-tenth 6 60.9 58.1 2.8 125 4 1976 1998 1933 1931 top-tenth 7 60.3 57.9 2.4 126 3 1976 1998 1933 1934 top-tenth 8 58.9 56.5 2.4 126 3 1976 1998 1933 1934 top-tenth 9 56.1 54.3 1.8 121 8 1976 2016 1933 1934 top-tenth 2011 10 53.4 51.8 1.6 119 10 1917 2016 1933 1934 top-tenth 1946,1986 11 51.2 49.4 1.8 122 7 1917,1979 1998 1933 1921 top-tenth 1954 12 49.6 47.6 2.0 124 4 1917,1979 2016 1933 1921 top-tenth 1921 18 53.1 51.1 2.0 123 5 1917 2016 1933 1934 top-tenth 24 49.2 47.6 1.6 122 5 1918 2017 1933 1934 top-tenth 1935 36 48.9 47.6 1.3 119 7 1905,1918 2017 1933 1934 top-tenth 1999,2006 48 49.0 47.6 1.4 121 4 1906 2018 1933 1934 top-tenth 2007 60 48.7 47.5 1.2 117 7 1906,1979 2019 1933 1934 top-tenth 2007,2016