1901-2000 Degrees Fahrenheit 1 39.6 39.9 -0.3 59 71 1940 1950 1918 1921 normal 1896 2 42.4 41.0 1.4 77 52 1918 1932 1920 1921 normal 3 45.9 43.8 2.1 98 31 1977 1932 1921 1916 top-third 1965 4 49.0 48.1 0.9 82 47 1977 1932 1921 1920 normal 1935,1992 5 55.1 52.9 2.2 110 19 1977 1932 1921 1916 top-third 6 59.1 57.1 2.0 113 16 1977 1932 1921 1907 top-third 7 62.3 60.3 2.0 116 13 1977 1932 1921 1901 top-tenth 2008 8 64.5 62.2 2.3 120 9 1977 1932 1921 1898 top-tenth 9 65.0 62.9 2.1 121 8 1977 2017 1921 1922 top-tenth 2019 10 64.5 62.6 1.9 120 9 1977 2017 1921 1922 top-tenth 11 64.1 61.5 2.6 127 2 1977 2017 1921 1922 top-tenth 12 62.5 59.9 2.6 127 2 1918,1977 2017 1921 1922 top-tenth 2020 18 60.9 59.0 1.9 119 9 1977 2017 1921 1922 top-tenth 1933 24 61.2 59.9 1.3 115 13 1977 1923,2017 1921 1898 top-tenth 36 61.1 59.9 1.2 113 14 1970 2019,2021 1921 1922 top-third 48 61.1 59.9 1.2 118 8 1970,1980 2020 1921 1922 top-tenth 1935,2018 60 60.3 59.9 0.4 78 47 1980,1981 2020,2021 1921 1916 normal 1900,1902,1910,1912,1914,1916,1941,1954,1992,2005,2015