1901-2000 Degrees Fahrenheit 1 37.3 38.3 -1.0 47 83 1917 1934 1967 1968 normal 2019 2 34.3 36.2 -1.9 26 104 1917 2015 1964 1968 bottom-third 3 32.2 34.2 -2.0 22 108 1922 2015 1962 1968 bottom-third 1962,1979,1993 4 32.0 33.6 -1.6 21 108 1949 1934 1955 1968 bottom-third 1906,1916 5 33.2 34.4 -1.2 29 100 1917 1934 1962 1968 bottom-third 1919 6 35.5 36.7 -1.2 25 104 1917 2015 1962 1968 bottom-third 1993 7 38.7 39.6 -0.9 32 97 1917 2015 1962 1968 bottom-third 1896,1993 8 41.6 42.7 -1.1 27 102 1917 2015 1962 1968 bottom-third 1896,1962 9 44.4 45.1 -0.7 31 98 1917 2015 1962 1968 bottom-third 1962 10 45.8 46.3 -0.5 33 96 1917 2015 1957 1968 bottom-third 1900,1902,1909,1923,1925 11 46.2 46.7 -0.5 36 93 1917 2015 1960 1968 bottom-third 1942,1960 12 45.8 46.5 -0.7 28 101 1917 2015 1956 1968 bottom-third 1909 18 43.4 43.2 0.2 67 61 1917 2016 1965 1968 normal 1971,1974,1983,2011 24 47.0 46.5 0.5 78 50 1913,1917 2016 1966 1968 normal 1926,1934,1975 36 47.3 46.5 0.8 85 42 1913 2016 1967 1968 top-third 1935,1959 48 47.1 46.4 0.7 84 42 1913 2016,2018 1968 1968 top-third 1968,1981,2011 60 46.9 46.4 0.5 76 49 1917 2018 1967 1968 normal 1978,1981