1991-2020 Degrees Fahrenheit 1 54.7 52.5 2.2 108 17 1905 2015 1939 1918 top-third 2 60.9 59.2 1.7 109 15 1895 1963 1939 1938 top-third 3 65.7 64.5 1.2 109 15 1912 2022 1939 1938 top-third 4 68.5 67.4 1.1 111 13 1912 2022 1939 1938 top-third 2017 5 69.3 67.2 2.1 116 8 1912 2021 1939 1938 top-tenth 6 68.2 66.0 2.2 120 4 1916 2015 1939 1940 top-tenth 7 66.2 63.9 2.3 121 3 1916 2021 1939 1940 top-tenth 8 63.8 61.6 2.2 121 3 1912 2015 1939 1940 top-tenth 9 61.3 59.1 2.2 122 2 1913 2015 1939 1940 top-tenth 10 58.5 56.8 1.7 119 5 1916 2015 1939 1934 top-tenth 11 56.9 54.8 2.1 119 3 1916 2015 1939 1940 top-tenth 1992 12 55.5 53.7 1.8 118 4 1916 2015 1939 1940 top-tenth 18 59.2 57.8 1.4 115 5 1917 2015 1939 1940 top-tenth 24 54.6 53.8 0.8 113 6 1917 2016 1939 1940 top-tenth 1967 36 54.6 53.8 0.8 112 5 1913,1917 2016 1939 1940 top-tenth 48 53.7 53.8 -0.1 96 19 1913 2016 1939 1940 top-third 1968,1991,1994,1995,2008 60 53.4 53.8 -0.4 83 30 1913,1920 2016 1939 1940 top-third 1967,1970,1999