1901-2000 Degrees Fahrenheit 1 22.5 12.9 9.6 120 9 1983 2015 1930 1923 top-tenth 2 28.2 20.4 7.8 122 7 1985 2001 1930 1923 top-tenth 3 35.2 28.6 6.6 126 3 1919 2015 1930 1931 top-tenth 2011 4 42.2 35.7 6.5 127 2 1985 2015 1930 1931 top-tenth 5 47.0 41.8 5.2 127 2 1985 2015 1930 1931 top-tenth 6 51.0 46.3 4.7 127 2 1985 2015 1930 1931 top-tenth 7 53.4 48.8 4.6 128 1 1985 1931,2021 1930 1931 highest 2021 8 53.3 49.5 3.8 126 3 1917 2021 1930 1931 top-tenth 2001 9 52.3 48.6 3.7 126 3 1917 2015,2021 1930 1931 top-tenth 10 49.7 46.2 3.5 123 6 1917,1950 2021 1930 1931 top-tenth 11 47.5 43.1 4.4 125 4 1917 1987 1930 1931 top-tenth 2016 12 45.0 40.1 4.9 126 3 1917 1987 1930 1931 top-tenth 18 46.0 42.2 3.8 125 3 1917 2012 1930 1931 top-tenth 2006 24 43.1 40.1 3.0 118 10 1917 1999 1930 1931 top-tenth 36 41.3 40.1 1.2 102 25 1917,1918 2017 1930 1931 top-third 1954 48 41.1 40.0 1.1 94 32 1919 2001 1930 1931 top-third 1942,1984,2011 60 40.6 40.0 0.6 81 44 1907,1920 2002 1930 1931 normal 1985,1993,1995