1901-2000 Degrees Fahrenheit 1 37.5 38.3 -0.8 46 84 1926 2010 1961 1963 normal 2 32.0 32.1 -0.1 62 68 1926 2010 1963 1962 normal 3 27.1 26.4 0.7 71 59 1923 2010 1963 1960 normal 1922,1996 4 24.7 23.1 1.6 87 43 1923 2010 1963 1960 top-third 5 22.1 22.2 -0.1 54 75 1923 2010 1963 1962 normal 1970,1976,1990 6 24.5 23.9 0.6 72 57 1923 2010 1963 1962 normal 1976 7 27.9 26.8 1.1 89 40 1918 2012,2023 1963 1960 top-third 1919,1988,2005 8 30.9 30.3 0.6 77 52 1905,1918 2012 1963 1962 normal 1919 9 34.1 33.9 0.2 59 70 1905 2023 1963 1962 normal 1968,1979,1987 10 37.5 37.1 0.4 74 55 1905 2012,2023 1963 1962 normal 1902,1919 11 39.7 39.1 0.6 77 52 1905 2023 1963 1962 normal 1947 12 40.6 40.1 0.5 76 53 1918 2023 1963 1962 normal 1947 18 34.6 34.7 -0.1 50 78 1905 2013 1963 1962 normal 1939,1966,1968,1977 24 39.7 40.1 -0.4 33 95 1905 2023 1944 1963 bottom-third 1901,1941 36 40.1 40.1 0.0 53 74 1906 2023 1963 1962 normal 1942,1971,1977,1978 48 40.1 40.0 0.1 48 78 1907 2023 1959 1963 normal 1938,1941,1942,1946,1969,1971 60 40.4 40.0 0.4 72 53 1908 2023 1963 1962 normal 1976,1977,1996,1997