1901-2000 Degrees Fahrenheit 1 48.8 50.2 -1.4 43 86 1907,1927 1934 1909 1912 bottom-third 1915,1938,1990 2 45.8 45.5 0.3 74 55 1975 1934 1912 1910 normal 1947 3 37.9 40.1 -2.2 24 105 1899 1910 1912 1911 bottom-third 4 31.9 35.4 -3.5 13 116 1899 1992 1904 1912 bottom-tenth 1929 5 28.0 31.7 -3.7 13 116 1899 1992 1907 1912 bottom-tenth 6 27.6 29.9 -2.3 21 107 1917 1992 1912 1911 bottom-third 1952,1956,1975 7 28.5 29.8 -1.3 35 93 1899 1992 1912 1911 bottom-third 1928,1972,2019 8 30.0 31.5 -1.5 26 102 1899 1934,2000 1912 1911 bottom-third 1972,1996 9 31.9 34.0 -2.1 19 109 1899 2016 1912 1911 bottom-third 1903,1962 10 34.7 37.0 -2.3 14 114 1917 1992,2016 1912 1911 bottom-third 11 37.1 39.6 -2.5 9 119 1917 1992,2016 1912 1911 bottom-tenth 12 39.0 41.1 -2.1 11 117 1917 2016 1912 1911 bottom-tenth 1950 18 35.1 37.4 -2.3 8 119 1917 2016 1912 1912 bottom-tenth 1912 24 38.7 41.1 -2.4 3 124 1917 2016 1899 1912 bottom-tenth 1899 36 39.4 41.1 -1.7 6 120 1918 2017 1899 1912 bottom-tenth 1929 48 39.9 41.1 -1.2 11 114 1899,1952 2016 1900 1912 bottom-tenth 1950 60 39.9 41.1 -1.2 8 116 1952 2016 1900 1912 bottom-tenth 1918