1991-2020 Degrees Fahrenheit 1 70.5 69.8 0.7 107 20 1909 2015 2016 2015 top-third 2 67.6 66.5 1.1 110 17 1954 2015 2016 2015 top-third 1967,2013 3 64.7 63.7 1.0 114 12 1916 2015 2013 2016 top-tenth 2003,2004 4 61.2 60.7 0.5 104 22 1899,1955 2021 2012 2016 top-third 1900,1925,1951 5 58.7 58.2 0.5 106 18 1955 2015 2013 2016 top-third 1947,1994,2013 6 56.1 55.9 0.2 102 21 1917 2015 2012 2016 top-third 1924,1925,1969,1978 7 53.4 54.0 -0.6 80 42 1916,1917 2015 2012 2016 normal 1945,2009 8 51.3 52.5 -1.2 51 70 1917 2015 2012 2016 normal 1956,1957,1969,1974,1980,1984,1989,1993,2001 9 51.4 51.8 -0.4 78 43 1917 2015 2012 2016 normal 1924 10 51.8 52.1 -0.3 78 43 1917 2015 2012 2016 normal 2002 11 52.8 53.2 -0.4 76 44 1917 2015 2012 2016 normal 1905,1924,1989 12 54.4 54.6 -0.2 88 30 1917 2015 2012 2016 top-third 18 55.7 55.0 0.7 106 10 1917 2015,2016 2014 2016 top-tenth 1958 24 55.5 54.6 0.9 107 4 1917 2016 2014 2016 top-tenth 1959,2022 36 56.2 54.6 1.6 104 1 1917 2016,2017 2016 2016 highest 2016 48 55.8 54.6 1.2 98 2 1913 2018 2016 2016 top-tenth 2016 60 55.6 54.6 1.0 92 3 1919 2018,2019 2016 2017 top-tenth