1901-2000 Degrees Fahrenheit 1 31.0 25.9 5.1 114 15 1923 2010 1998 1979 top-third 1931 2 26.2 20.5 5.7 124 5 1923 2010 1997 1998 top-tenth 3 22.2 18.0 4.2 118 11 1923 2010 1997 1998 top-tenth 2018 4 23.2 18.2 5.0 121 7 1923 2016 1998 1999 top-tenth 5 25.3 21.0 4.3 118 10 1934 2010 1998 1983 top-tenth 6 28.6 24.9 3.7 119 9 1918 2012 1998 1983 top-tenth 2013 7 32.6 29.2 3.4 118 10 1918 2012 1998 1983 top-tenth 2017,2018,2022 8 36.7 33.4 3.3 117 11 1905 2016 1998 1999 top-tenth 9 39.9 36.9 3.0 117 11 1905 2012 1998 1999 top-tenth 10 41.9 39.2 2.7 117 11 1905 2012 1998 1953 top-tenth 1953 11 43.2 40.3 2.9 120 8 1918 2012,2016 1998 1999 top-tenth 2006,2010,2017 12 43.1 40.1 3.0 120 8 1918 2012 1998 1999 top-tenth 2010 18 38.0 35.0 3.0 118 9 1905 2013 1998 1999 top-tenth 24 42.1 40.1 2.0 115 12 1905 2013 1998 1954 top-tenth 36 41.7 40.1 1.6 108 18 1906 2012,2013 1998 1954 top-third 48 41.4 40.0 1.4 102 23 1907 2013 1998 1956 top-third 1955,1956,2005 60 41.5 40.0 1.5 101 23 1908 2013 1998 1954 top-third 1953,2007