1901-2000 Degrees Fahrenheit 1 56.4 52.2 4.2 117 12 1917 1911 1941 1918 top-tenth 2 49.6 46.1 3.5 122 7 1917 2010 1941 1921 top-tenth 3 43.9 39.8 4.1 123 6 1926 2012 1941 1921 top-tenth 1945 4 36.4 34.0 2.4 104 25 1926 2012 1941 1921 top-third 2004 5 32.2 30.2 2.0 102 27 1923 2012 1941 1933 top-third 1910,2022 6 30.6 28.6 2.0 103 25 1907 2012 1941 1933 top-third 7 31.3 29.2 2.1 102 26 1905 2012 1941 1933 top-third 1980 8 33.0 31.2 1.8 100 28 1905 2012 1941 1933 top-third 1980,1985 9 35.6 34.0 1.6 100 28 1905 2012 1941 1933 top-third 1960 10 38.1 36.9 1.2 94 34 1905 2012 1941 1933 top-third 2004 11 40.8 39.6 1.2 97 31 1905 2012 1941 1933 top-third 1913 12 42.6 41.4 1.2 98 30 1905 2012 1941 1933 top-third 1980,2009 18 37.8 37.1 0.7 82 45 1905 2013 1941 1938 normal 1931,1949 24 41.5 41.3 0.2 60 67 1905 2013 1941 1939 normal 1902,1910,1937,1973 36 41.0 41.3 -0.3 33 93 1906 2012,2013 1941 1940 bottom-third 1943,1966,1969,1972 48 41.1 41.3 -0.2 39 86 1907 2013 1941 1940 bottom-third 1900,1946,1972,1979 60 41.3 41.3 0.0 50 74 1908 2013 1941 1940 normal 1902,1903,1931,1940,1979