1991-2020 Degrees Fahrenheit 1 36.2 44.7 -8.5 12 112 1917 2017 1917 1919 bottom-tenth 2 33.2 39.9 -6.7 19 105 1933 2017 1917 1919 bottom-third 3 26.8 35.7 -8.9 12 112 1917 2017 1917 1919 bottom-tenth 4 23.1 33.8 -10.7 4 119 1917 2015 1917 1919 bottom-tenth 5 25.1 34.9 -9.8 3 120 1917 2017 1917 1919 bottom-tenth 6 28.3 37.9 -9.6 2 121 1917 2017 1917 1919 bottom-tenth 7 33.6 42.0 -8.4 4 119 1917 2017 1917 1919 bottom-tenth 8 38.6 46.2 -7.6 4 119 1917 2017 1917 1919 bottom-tenth 9 42.9 49.9 -7.0 4 119 1917 2017 1917 1919 bottom-tenth 10 45.6 52.1 -6.5 4 119 1917 2017 1917 1919 bottom-tenth 1929 11 47.0 53.0 -6.0 5 118 1917 2017 1917 1919 bottom-tenth 12 47.3 52.9 -5.6 6 117 1913 2017 1917 1919 bottom-tenth 18 42.2 47.9 -5.7 9 113 1913 2018 1918 1919 bottom-tenth 24 47.6 52.9 -5.3 7 115 1913 2018 1918 1919 bottom-tenth 1910,1933 36 47.9 52.9 -5.0 7 114 1914 2019 1919 1916 bottom-tenth 1921,1930 48 47.2 52.8 -5.6 1 119 1920 2018,2020 1920 1919 lowest 60 47.4 52.7 -5.3 2 117 1917 2019,2021 1917 1919 bottom-tenth