1901-2000 Degrees Fahrenheit 1 43.1 34.6 8.5 125 5 1960 2012 1999 1946 top-tenth 2 37.8 28.7 9.1 128 2 1899 2012 1999 2000 top-tenth 3 32.4 25.0 7.4 125 5 1912 2012 1999 1992 top-tenth 1990 4 31.1 24.5 6.6 125 4 1979 2012 1999 1992 top-tenth 5 33.7 26.7 7.0 127 2 1912 2012 1999 2000 top-tenth 6 36.6 30.9 5.7 127 2 1912 2012 1999 2000 top-tenth 2017 7 40.1 35.4 4.7 125 4 1912 2012 1999 2000 top-tenth 8 43.8 39.9 3.9 124 5 1912 2012 1999 1999 top-tenth 1999 9 47.5 43.7 3.8 126 3 1899,1912 2012 1999 2000 top-tenth 2002,2016 10 49.6 46.3 3.3 124 5 1899,1904 2012 1999 1932 top-tenth 11 50.6 47.5 3.1 124 5 1899 2012 1999 1999 top-tenth 1999,2002 12 50.6 47.5 3.1 124 5 1899,1936 2012 1999 2000 top-tenth 18 45.4 42.0 3.4 125 3 1979 2017 1999 2000 top-tenth 24 50.5 47.5 3.0 126 2 1905,1952 2017 1999 2000 top-tenth 36 49.8 47.5 2.3 125 2 1918 2018 1999 2000 top-tenth 48 48.8 47.5 1.3 110 16 1906 1935,2002 1999 1992 top-third 2013,2023 60 48.3 47.5 0.8 96 29 1997 1935 1999 1992 top-third 2001,2022