1901-2000 Degrees Fahrenheit 1 28.1 26.7 1.4 76 53 1989 2015 2002 2001 normal 1907 2 34.2 30.9 3.3 117 12 1917 2015 2002 2001 top-tenth 1971,2009 3 37.4 35.5 1.9 93 36 1917 2015 2002 2001 top-third 1946,1973 4 42.8 40.7 2.1 105 24 1917 2015 2002 1999 top-third 1999 5 47.6 45.1 2.5 116 13 1917 2018 2002 1971 top-tenth 2005,2009,2012 6 50.7 48.4 2.3 114 15 1917 2018 2002 1971 top-third 7 52.1 50.0 2.1 114 15 1917 2015,2018 2002 1971 top-third 2010,2017 8 52.0 50.1 1.9 109 20 1917 2018 2002 1998 top-third 1991,2005,2009 9 50.8 49.1 1.7 107 22 1917 2015 2002 2002 top-third 2002 10 49.1 47.4 1.7 107 22 1917 2011 2001 2002 top-third 1990 11 46.7 45.3 1.4 103 26 1917 2012,2018,2020 2001 2002 top-third 1999,2007,2013 12 44.6 43.5 1.1 97 32 1904 2020 2000 2002 top-third 1898,1906,1959,1985 18 46.4 45.2 1.2 102 26 1904 2012,2020,2021 2001 2002 top-third 1973,1985,2009 24 45.2 43.5 1.7 109 19 1905 2021 2001 2002 top-third 36 45.0 43.5 1.5 104 23 1905 2021 2002 2000 top-third 48 44.7 43.5 1.2 100 26 1905 2020,2021 1998 2002 top-third 1991 60 44.8 43.5 1.3 104 21 1905 2021 2001 2002 top-third 1993,1994,2001