1901-2000 Degrees Fahrenheit 1 50.7 52.9 -2.2 9 120 1945 2022 1907 1906 bottom-tenth 1965 2 46.1 48.5 -2.4 5 124 1907 2018 1907 1906 bottom-tenth 3 43.2 44.2 -1.0 20 109 1983 2018 1907 1906 bottom-third 4 40.6 40.2 0.4 63 66 1917 2020 1907 1905 normal 1921,1963,1966 5 37.4 36.9 0.5 73 56 1964 2017 1907 1906 normal 1914,1931,1997,1999,2010 6 34.6 34.0 0.6 71 58 1964 2017 1906 1907 normal 1952,1997 7 32.8 32.1 0.7 79 49 1964 2017 1906 1907 normal 1920,1952,1997,2007 8 32.3 31.5 0.8 83 45 1964 2017 1906 1907 normal 1936,2007 9 33.3 32.3 1.0 91 37 1933 2017 1906 1907 top-third 1900,1981,1985 10 34.9 34.1 0.8 87 41 1913 2017 1906 1907 top-third 1920,1985 11 37.0 36.1 0.9 90 38 1913 2017 1906 1907 top-third 1898,1985,1992 12 38.7 38.0 0.7 87 41 1913 2017 1906 1907 top-third 1936,1985,1992,1997,2007,2008 18 37.7 36.7 1.0 101 27 1913 2018 1907 1897 top-third 24 38.8 38.0 0.8 98 29 1913 2018 1907 1898 top-third 1982,2010 36 38.6 38.0 0.6 93 33 1977 2018 1906 1907 top-third 1898,1912 48 38.7 38.0 0.7 99 26 1977 2018 1907 1908 top-third 1911,1937,1996,2010 60 38.5 38.0 0.5 94 30 1977 2019,2020 1907 1908 top-third 1982,1985,1986