1901-2000 Degrees Fahrenheit 1 49.1 43.1 6.0 120 10 1905 2017 1998 1999 top-tenth 2 45.5 41.2 4.3 116 14 1978 2017 1998 1999 top-third 3 45.0 41.3 3.7 120 9 1978 1932 1998 1999 top-tenth 2012 4 47.7 43.5 4.2 126 3 1977 1932 1999 1932 top-tenth 2016 5 50.5 47.1 3.4 123 6 1977 1932 1998 1999 top-tenth 6 54.1 51.4 2.7 123 6 1977 1932 1998 1999 top-tenth 7 58.0 55.4 2.6 124 5 1977 1932 1998 1999 top-tenth 8 60.9 58.5 2.4 124 5 1977 1932,2017 1998 1999 top-tenth 2012,2023 9 62.7 60.5 2.2 120 9 1977 2017 1998 1999 top-tenth 10 63.2 61.3 1.9 120 9 1977 1999 1998 1999 top-tenth 1934 11 63.2 61.3 1.9 120 9 1977 1999,2017 1998 1999 top-tenth 1955,2013 12 62.0 60.4 1.6 116 13 1977 2017 1998 1999 top-tenth 1897,1934,2008 18 59.8 57.4 2.4 126 2 1905 2017 1999 2000 top-tenth 2013 24 62.6 60.4 2.2 125 3 1905 2017 1999 2000 top-tenth 36 61.8 60.4 1.4 123 4 1979 2013 1999 2000 top-tenth 2001 48 61.3 60.4 0.9 108 18 1980 2019 1999 1957 top-third 1922,1940,2009 60 61.1 60.4 0.7 102 23 1980 2020 1999 1958 top-third 1924,2001,2006,2007,2012,2016