1901-2000 Degrees Fahrenheit 1 40.6 45.3 -4.7 6 124 1903 2015 1949 2018 bottom-tenth 2 43.4 43.9 -0.5 42 88 1949 2015 2001 2018 bottom-third 1901,1908,1921,1951,1957,1972 3 43.8 43.6 0.2 56 73 1949 2015 2013 2018 normal 1908,1968 4 46.0 45.1 0.9 87 42 1949 2015 2013 2018 top-third 1902,1918,1958,2012 5 49.0 48.0 1.0 88 41 1949 2015 2013 2018 top-third 1927,1953,2013 6 52.7 51.4 1.3 99 30 1917,1949 2015 2017 2018 top-third 1930,1970 7 56.1 54.6 1.5 106 23 1917 2015 2017 2018 top-third 1963,1970,2012 8 59.0 57.1 1.9 117 12 1917 2015 2017 2018 top-tenth 1934,1968,2000,2006,2020 9 60.4 58.3 2.1 119 10 1917 2015 2017 2018 top-tenth 10 60.7 58.6 2.1 120 9 1917 2015 2017 2018 top-tenth 2003 11 60.3 58.1 2.2 122 7 1949 2015 2017 2018 top-tenth 2003 12 59.4 57.4 2.0 120 9 1949 2015 2013 2018 top-tenth 2009 18 57.8 55.4 2.4 120 8 1913,1949 2015 2017 2018 top-tenth 24 60.1 57.4 2.7 123 5 1913 2015,2016 2017 2018 top-tenth 36 59.9 57.4 2.5 120 7 1914 2016 2014 2018 top-tenth 48 60.0 57.4 2.6 122 4 1913 2018 2015 2018 top-tenth 60 60.3 57.3 3.0 123 2 1913 2018 2017 2018 top-tenth