1901-2000 Degrees Fahrenheit 1 62.9 64.4 -1.5 38 91 1917 2018 1961 1962 bottom-third 2016 2 60.2 59.8 0.4 66 63 1907 1896 1961 1962 normal 3 56.6 55.0 1.6 98 31 1960 2012 1962 1955 top-third 1942,1964 4 49.8 50.4 -0.6 46 83 1960 2012 1961 1962 normal 1913,1970 5 45.1 47.0 -1.9 18 111 1978 2012 1960 1962 bottom-third 1970 6 42.8 45.2 -2.4 8 120 1978 2012 1961 1962 bottom-tenth 1936,1961 7 42.9 45.3 -2.4 11 117 1978 2012 1960 1962 bottom-tenth 1984 8 44.9 46.7 -1.8 15 113 1978 2012,2017 1960 1962 bottom-third 1984,1996 9 47.2 49.2 -2.0 9 119 1978 2017 1958 1962 bottom-tenth 10 49.9 51.7 -1.8 9 119 1977 2017 1958 1962 bottom-tenth 11 52.2 54.0 -1.8 8 120 1977 2017 1958 1962 bottom-tenth 1951 12 53.8 55.5 -1.7 6 122 1977 2017 1951 1962 bottom-tenth 1951,1970 18 51.0 52.1 -1.1 15 112 1979 2017 1961 1962 bottom-third 1904,1941,1960,1997,2015 24 54.5 55.5 -1.0 14 113 1978 2017 1961 1962 bottom-third 1919,1981,1994,2015 36 54.4 55.5 -1.1 11 115 1979 2018 1960 1962 bottom-tenth 1918,1981 48 54.4 55.5 -1.1 9 116 1980 2019 1961 1962 bottom-tenth 60 54.5 55.5 -1.0 7 117 1981 2020 1962 1962 bottom-tenth 1962,1964,1968,1969,1972