1991-2020 Degrees Fahrenheit 1 66.0 69.2 -3.2 29 101 1931 2006 1916 1918 bottom-third 2 62.3 65.8 -3.5 27 103 1915 2006 1915 1918 bottom-third 3 58.4 62.6 -4.2 25 105 1958 2017 1915 1918 bottom-third 4 55.6 59.9 -4.3 20 110 1978 2017 1915 1918 bottom-third 1931,1983 5 55.0 58.6 -3.6 27 102 1915 2017 1915 1918 bottom-third 1966 6 55.0 58.9 -3.9 15 114 1912 2017 1915 1918 bottom-third 1947,1959 7 57.0 60.6 -3.6 18 111 1977 2017 1915 1918 bottom-third 1906,1979 8 59.1 63.0 -3.9 11 118 1977 2017 1915 1918 bottom-tenth 1913 9 61.8 65.4 -3.6 11 118 1977 2017 1915 1918 bottom-tenth 1914,1959,1975 10 63.9 67.4 -3.5 13 116 1977 2017 1915 1918 bottom-tenth 1906,1913,1914,1959,1969 11 65.4 68.7 -3.3 19 110 1977 2017 1915 1918 bottom-third 12 66.1 69.3 -3.2 20 109 1977 2017,2023 1915 1918 bottom-third 1936,1960 18 62.9 65.8 -2.9 21 107 1913 2017 1915 1918 bottom-third 1988 24 66.3 69.3 -3.0 17 111 1978 2017 1915 1918 bottom-third 36 66.5 69.3 -2.8 15 112 1906 2018 1916 1918 bottom-third 1900,1901,1904,1916,1961,1969 48 67.0 69.2 -2.2 34 92 1915 2023 1918 1912 bottom-third 1903,1944,1947,1981 60 66.7 69.1 -2.4 18 107 1977,1979 2020 1918 1913 bottom-third 1900,1909,1920,1922,1970