1901-2000 Degrees Fahrenheit 1 41.0 38.6 2.4 104 26 1897 1992 1997 1994 top-third 2003 2 39.4 35.8 3.6 119 11 1936 2015 1997 1992 top-tenth 1958 3 36.9 33.3 3.6 117 13 1950 2015 1997 1994 top-tenth 1994 4 35.8 32.7 3.1 114 15 1949 2015 1997 1994 top-third 1994 5 36.5 33.5 3.0 118 11 1949 1934 1997 1992 top-tenth 2005 6 38.2 35.8 2.4 117 12 1949 2015 1997 1992 top-tenth 1953,1958 7 41.2 38.8 2.4 116 13 1949 2015 1997 1992 top-tenth 1900 8 44.3 41.9 2.4 122 7 1949 2015 1997 1992 top-tenth 2005 9 46.4 44.3 2.1 118 11 1949 2015 1997 1992 top-tenth 2010 10 47.5 45.7 1.8 115 14 1949 2015 1997 1992 top-third 1926,2018,2021 11 48.1 46.2 1.9 119 10 1917 2015 1997 1992 top-tenth 1926,1940,2004,2010,2018 12 47.7 46.1 1.6 111 18 1949,1956 2015 1997 1995 top-third 1953,1958,1990,2003 18 43.6 42.7 0.9 95 33 1917 2016 1997 1995 top-third 1901,2000,2010,2018,2020 24 46.8 46.1 0.7 88 40 1950,1956 2016 1997 1996 top-third 2008 36 46.8 46.1 0.7 89 38 1957 2016 1997 1997 top-third 1928,1935,1982,1997 48 47.0 46.1 0.9 99 27 1952 2018 1997 1996 top-third 1927,1996,2002 60 47.0 46.1 0.9 98 27 1913,1952 2018,2019 1997 1996 top-third 1944,2004,2009