1991-2020 Degrees Fahrenheit 1 43.1 46.7 -3.6 40 89 1943 2017 1917 1915 bottom-third 2 37.4 40.5 -3.1 45 84 1926 2012 1917 1915 normal 2007,2015 3 31.1 35.5 -4.4 34 95 1904 2012 1917 1915 bottom-third 1965 4 25.9 32.4 -6.5 8 121 1904 2012 1914 1917 bottom-tenth 1905 5 23.5 31.7 -8.2 2 125 1904 2012 1904 1917 bottom-tenth 6 24.9 33.0 -8.1 2 123 1904 2012 1904 1917 bottom-tenth 7 27.7 35.4 -7.7 1 124 1918 2012 1918 1917 lowest 8 31.4 38.8 -7.4 1 124 1918 2012 1918 1917 lowest 9 35.6 42.2 -6.6 2 123 1904 2012 1905 1917 bottom-tenth 1905 10 39.0 45.1 -6.1 3 122 1904 2012 1905 1917 bottom-tenth 11 41.2 47.1 -5.9 2 123 1904 2012 1904 1917 bottom-tenth 12 41.7 48.0 -6.3 1 124 1918 2012 1918 1917 lowest 18 37.3 43.0 -5.7 2 119 1905 2017 1905 1917 bottom-tenth 24 43.0 48.0 -5.0 2 119 1905 2017 1905 1917 bottom-tenth 36 43.4 48.0 -4.6 3 114 1905,1906 2013 1906 1917 bottom-tenth 48 44.0 47.9 -3.9 3 111 1906 2019,2022 1906 1917 bottom-tenth 1920 60 44.1 47.9 -3.8 2 109 1920 2020 1906 1917 bottom-tenth 1906