1901-2000 Degrees Fahrenheit 1 46.3 51.1 -4.8 15 115 1960 2012 1960 1961 bottom-third 2 48.2 47.3 0.9 73 57 1960 1938 1960 1961 normal 1949,1952,2004,2008 3 44.6 45.0 -0.4 53 77 1978 2012 1960 1961 normal 4 44.1 44.3 -0.2 56 73 1978 1907 1961 1957 normal 5 45.5 45.4 0.1 61 68 1978 2017 1961 1957 normal 2009,2013 6 47.8 48.0 -0.2 53 76 1977 2017 1961 1957 normal 2009 7 51.3 51.5 -0.2 57 72 1977 2017 1961 1957 normal 1917,1953,2009 8 54.4 54.8 -0.4 44 85 1977 2017 1961 1961 normal 1926,1961,1966,1967,1971 9 56.8 57.5 -0.7 37 92 1977 2017 1960 1961 bottom-third 1975 10 58.3 59.3 -1.0 25 104 1977 2017 1960 1961 bottom-third 1915,1924,1936 11 58.9 60.1 -1.2 20 109 1977 2017 1960 1961 bottom-third 1984 12 58.6 60.1 -1.5 12 117 1977 2017 1958 1961 bottom-tenth 1970,1978 18 54.9 56.1 -1.2 18 110 1978 2017 1961 1961 bottom-third 1961,1971 24 59.2 60.1 -0.9 22 106 1978 2017 1960 1961 bottom-third 1919,1971 36 59.1 60.1 -1.0 11 116 1979 2018 1960 1961 bottom-tenth 1906,1968 48 59.1 60.1 -1.0 8 118 1980 2020 1961 1961 bottom-tenth 1961,1963,1964,1965 60 59.0 60.1 -1.1 6 119 1980,1981 2020 1962 1961 bottom-tenth 1964,1972