1901-2000 Degrees Fahrenheit 1 51.5 52.2 -0.7 48 81 1917 1911 1938 1942 normal 1916,1971 2 42.5 46.1 -3.6 6 123 1917 2010 1926 1942 bottom-tenth 3 36.5 39.8 -3.3 8 121 1926 2012 1939 1942 bottom-tenth 1939 4 31.7 34.0 -2.3 19 110 1926 2012 1940 1942 bottom-third 5 27.5 30.2 -2.7 12 117 1923 2012 1940 1942 bottom-tenth 6 25.6 28.6 -3.0 10 118 1907 2012 1934 1942 bottom-tenth 7 26.6 29.2 -2.6 12 116 1905 2012 1940 1942 bottom-tenth 8 29.1 31.2 -2.1 12 116 1905 2012 1940 1942 bottom-tenth 1935 9 32.2 34.0 -1.8 13 115 1905 2012 1940 1942 bottom-tenth 1956,1994 10 35.3 36.9 -1.6 14 114 1905 2012 1940 1942 bottom-third 11 38.1 39.6 -1.5 13 115 1905 2012 1940 1942 bottom-tenth 1911 12 40.1 41.4 -1.3 15 113 1905 2012 1940 1942 bottom-third 1927 18 36.9 37.1 -0.2 45 82 1905 2013 1941 1942 normal 1897,1910,1913,1916,1934,1969,1977 24 41.3 41.3 0.0 47 80 1905 2013 1941 1942 normal 1898,1899,1945,1956,1962,1969 36 41.0 41.3 -0.3 33 93 1906 2012,2013 1942 1942 bottom-third 1942,1966,1969,1972 48 40.7 41.3 -0.6 20 105 1907 2013 1937 1942 bottom-third 1904,1968 60 40.9 41.3 -0.4 25 99 1908 2013 1930 1942 bottom-third 1916,1965,1970,1971