1991-2020 Degrees Fahrenheit 1 79.3 82.6 -3.3 13 116 1931 2011 1895 1895 bottom-tenth 2 80.0 82.6 -2.6 24 105 1911 2011 1895 1895 bottom-third 1901,1929 3 79.2 82.0 -2.8 14 115 1903 2011 1895 1895 bottom-third 1897,1931,1940,1974 4 77.4 80.3 -2.9 17 110 1903 2010 1895 1895 bottom-third 1906,1940 5 75.0 77.8 -2.8 17 110 1903 2011 1895 1895 bottom-third 1940 6 72.5 75.2 -2.7 18 109 1931 2011 1895 1895 bottom-third 1983 7 68.0 72.4 -4.4 1 124 1895 2012 1895 1895 lowest 8 65.7 69.8 -4.1 3 122 1912 2012 1895 1895 bottom-tenth 9 -99 68.0 -99 -99 -99 1903 2017 normal 10 -99 67.1 -99 -99 -99 1903,1912 2017 normal 11 -99 67.3 -99 -99 -99 1903 2017 normal 12 -99 68.3 -99 -99 -99 1903 2017 normal 18 -99 70.6 -99 -99 -99 1902 2017 normal 24 -99 68.2 -99 -99 -99 1903 2017 normal 36 -99 68.2 -99 -99 -99 1904 2018 normal 48 -99 68.2 -99 -99 -99 1904 2019,2020 normal 60 -99 68.1 -99 -99 -99 1903 2020 normal