1901-2000 Degrees Fahrenheit 1 34.4 42.5 -8.1 4 126 1940 1950 1918 1917 bottom-tenth 1985 2 35.5 43.2 -7.7 2 127 1977 1932 1918 1917 bottom-tenth 3 39.6 45.9 -6.3 2 127 1977 1932 1918 1917 bottom-tenth 4 43.6 49.9 -6.3 2 127 1977 1932 1918 1917 bottom-tenth 5 49.2 54.5 -5.3 2 127 1977 1932 1918 1917 bottom-tenth 6 53.8 58.5 -4.7 2 127 1977 2017 1918 1917 bottom-tenth 7 57.3 61.4 -4.1 2 127 1977 2017 1918 1917 bottom-tenth 8 59.6 63.2 -3.6 2 127 1977 2017 1918 1917 bottom-tenth 9 60.1 63.8 -3.7 2 127 1977 2017 1918 1917 bottom-tenth 10 60.3 63.6 -3.3 2 127 1977 2017 1918 1917 bottom-tenth 11 59.7 62.6 -2.9 2 127 1977 2017 1918 1917 bottom-tenth 12 58.6 61.1 -2.5 2 127 1977 2017 1918 1917 bottom-tenth 18 58.7 60.2 -1.5 6 122 1977 2017 1905 1917 bottom-tenth 1959,1968 24 60.0 61.1 -1.1 8 120 1970,1977 2017 1905 1917 bottom-tenth 1971,1985 36 60.6 61.1 -0.5 26 101 1970 2019 1906 1917 bottom-third 1903,1983 48 60.6 61.1 -0.5 28 98 1970 2020 1907 1917 bottom-third 60 60.8 61.1 -0.3 30 95 1970 2020,2021 1908 1917 bottom-third 1974,1997,1998