Contiguous U.S., Minimum Temperature Rankings, September 1896 1901-2000 Degrees Fahrenheit 1 50.59 51.90 -1.31 17 112 1918 2019 1896 1895 bottom-third 2 54.86 55.48 -0.62 30 99 1974 2019 1896 1895 bottom-third 1929 3 57.02 57.16 -0.14 45 84 1924 2022 1895 1896 normal 1932 4 56.90 56.78 0.12 59 70 1903 2021 1895 1896 normal 5 55.54 54.91 0.63 86 43 1907,1924 2018 1895 1896 top-third 6 53.01 52.20 0.81 96 33 1907 2018 1895 1896 top-third 1925 7 49.24 49.02 0.22 68 61 1917 2012 1895 1896 normal 8 46.02 45.75 0.27 75 54 1917 2012 1895 1896 normal 9 43.30 42.86 0.44 83 46 1917 2012 1895 1896 normal 1994 10 41.10 40.84 0.26 75 53 1917 2016 1896 1896 normal 1914 11 39.93 39.92 0.01 61 67 1917 2016 1896 1896 normal 1976,2014 12 39.70 40.04 -0.34 34 94 1917 2016 1896 1896 bottom-third 1907 18 43.72 44.09 -0.37 28 100 1917 2016 1896 1896 bottom-third 24 -99 40.04 -99 -99 -99 1918 2017 normal 36 -99 40.02 -99 -99 -99 1918 2017,2018 normal 48 -99 40.01 -99 -99 -99 1918 2018 normal 60 -99 40.00 -99 -99 -99 1920 2019,2020 normal