1901-2000 Degrees Fahrenheit 1 12.5 27.7 -15.2 2 128 1977 2006 1918 1917 bottom-tenth 2 17.3 29.7 -12.4 1 128 1918 1932 1918 1917 lowest 3 25.7 33.9 -8.2 2 127 1977 1932 1918 1917 bottom-tenth 4 31.0 39.4 -8.4 2 127 1977 1932 1918 1917 bottom-tenth 5 37.9 45.0 -7.1 2 127 1977 1932 1918 1917 bottom-tenth 6 43.7 49.9 -6.2 2 127 1977 1932 1918 1917 bottom-tenth 7 48.2 53.6 -5.4 2 127 1977 1932 1918 1917 bottom-tenth 8 50.8 56.0 -5.2 2 127 1977 1932 1918 1917 bottom-tenth 9 51.5 56.8 -5.3 1 128 1918,1977 1932 1918 1917 lowest 1977 10 51.4 56.4 -5.0 1 128 1918 1932 1918 1917 lowest 11 50.6 55.0 -4.4 1 128 1918 2013 1918 1917 lowest 12 48.7 53.1 -4.4 1 128 1918 2013 1918 1917 lowest 18 49.1 52.0 -2.9 2 126 1905 2013 1905 1917 bottom-tenth 24 50.6 53.1 -2.5 1 127 1918 2013 1918 1917 lowest 36 51.4 53.0 -1.6 2 125 1905 2013 1905 1917 bottom-tenth 1979 48 51.7 53.0 -1.3 3 123 1905 1934,2013,2020 1906 1917 bottom-tenth 1906,1982 60 52.3 53.0 -0.7 14 111 1981 1935,2020,2021 1909 1917 bottom-third 1904,1909,1920,1921,1972