1901-2000 Degrees Fahrenheit 1 28.3 32.6 -4.3 18 112 1903 1995,2015 1903 1909 bottom-third 2 25.9 30.5 -4.6 11 119 1949 2015 1903 1909 bottom-tenth 3 24.5 30.2 -5.7 5 124 1949 2015 1910 1909 bottom-tenth 4 27.9 32.1 -4.2 6 123 1949 2015 1910 1909 bottom-tenth 5 32.3 35.6 -3.3 6 123 1949 2015 1910 1909 bottom-tenth 1985 6 36.8 39.8 -3.0 7 122 1949 2015 1910 1909 bottom-tenth 7 41.5 44.0 -2.5 7 122 1949 2015 1910 1909 bottom-tenth 8 45.1 47.5 -2.4 6 123 1949 2015 1903 1909 bottom-tenth 1903 9 47.3 49.2 -1.9 6 123 1949 2015 1910 1909 bottom-tenth 1942 10 47.8 49.7 -1.9 5 124 1917 2015 1910 1909 bottom-tenth 11 47.5 49.3 -1.8 5 124 1917,1949 2015 1910 1909 bottom-tenth 12 46.6 48.4 -1.8 5 124 1949 2015 1910 1909 bottom-tenth 18 44.2 45.6 -1.4 8 120 1949 1935 1910 1909 bottom-tenth 24 47.1 48.4 -1.3 7 121 1913 2016 1910 1909 bottom-tenth 36 47.3 48.4 -1.1 3 124 1914 2017 1910 1909 bottom-tenth 1949,1950 48 47.5 48.4 -0.9 4 122 1915,1949 2018 1910 1909 bottom-tenth 1916,1917 60 47.5 48.4 -0.9 5 120 1917 2018 1910 1909 bottom-tenth 1914,1950