1991-2020 Degrees Fahrenheit 1 71.1 74.2 -3.1 10 119 1967 1936 1963 1965 bottom-tenth 2 73.5 74.8 -1.3 37 92 1967 1936 1965 1964 bottom-third 1912,1968,1997 3 72.3 73.8 -1.5 31 98 1967 1936 1965 1964 bottom-third 1968 4 69.0 71.3 -2.3 17 112 1967 1936 1963 1965 bottom-third 5 65.4 68.0 -2.6 14 115 1907 2010 1961 1965 bottom-third 6 61.7 64.1 -2.4 19 110 1950 2012 1961 1965 bottom-third 7 57.4 60.1 -2.7 16 113 1958 2012 1960 1965 bottom-third 1926,1967 8 53.2 56.6 -3.4 7 122 1978 2012 1958 1965 bottom-tenth 9 51.5 54.4 -2.9 15 113 1978 2012 1963 1965 bottom-third 1960,1968 10 50.9 53.4 -2.5 22 106 1978 2012 1963 1965 bottom-third 11 51.0 53.7 -2.7 15 113 1978 2012 1963 1965 bottom-third 1961 12 52.4 54.8 -2.4 13 115 1978 2017 1963 1965 bottom-tenth 1912 18 55.6 57.9 -2.3 9 119 1918 2017 1961 1965 bottom-tenth 24 52.7 54.8 -2.1 14 113 1978 2017 1961 1965 bottom-third 1982 36 53.1 54.7 -1.6 18 108 1979 2018 1965 1964 bottom-third 1918,1919,1962 48 52.8 54.7 -1.9 11 114 1980 2019 1963 1965 bottom-tenth 1963 60 53.1 54.7 -1.6 15 109 1970,1981 2020 1965 1965 bottom-third 1906,1908,1961,1965,1983,1984