1991-2020 Degrees Fahrenheit 1 78.1 82.3 -4.2 16 113 1903 2022 1895 1895 bottom-third 2 74.6 79.3 -4.7 9 120 1903 2022 1895 1895 bottom-tenth 3 72.0 75.9 -3.9 14 115 1903 2022 1895 1895 bottom-third 1952,1983 4 68.9 72.6 -3.7 17 112 1903 2022 1895 1895 bottom-third 1920 5 63.7 69.3 -5.6 2 127 1903 2017 1895 1895 bottom-tenth 6 61.5 66.4 -4.9 5 124 1903 2017 1895 1895 bottom-tenth 7 -99 64.5 -99 -99 -99 1903 2017 normal 8 -99 64.0 -99 -99 -99 1912 2017 normal 9 -99 64.8 -99 -99 -99 1977 2017 normal 10 -99 66.3 -99 -99 -99 1977 2017 normal 11 -99 68.0 -99 -99 -99 1977 2017 normal 12 -99 69.3 -99 -99 -99 1977 2017 normal 18 -99 68.3 -99 -99 -99 1904,1913 2017 normal 24 -99 69.3 -99 -99 -99 1978 2017,2018 normal 36 -99 69.3 -99 -99 -99 1905 2018 normal 48 -99 69.2 -99 -99 -99 1915 2020 normal 60 -99 69.1 -99 -99 -99 1979 2020 normal