1991-2020 Degrees Fahrenheit 1 55.7 51.5 4.2 125 5 1955 1934 1929 1926 top-tenth 2 50.6 48.4 2.2 119 11 1955 1934 1929 1926 top-tenth 3 47.5 45.4 2.1 120 10 1929 1934 1929 1926 top-tenth 4 39.3 43.1 -3.8 20 110 1929 1934 1929 1928 bottom-third 1985 5 39.1 41.5 -2.4 40 86 1929 1992 1929 1927 bottom-third 2019 6 38.5 41.5 -3.0 23 103 1929,1937 1992 1929 1928 bottom-third 1960,1986 7 40.5 43.0 -2.5 25 99 1929 2016 1929 1928 bottom-third 1933 8 42.9 45.9 -3.0 21 102 1917 1992,2015,2016 1929 1928 bottom-third 1932 9 46.5 49.2 -2.7 24 99 1913 1992,2016 1929 1928 bottom-third 1909,1928,1933,1965 10 49.3 51.8 -2.5 27 96 1913,1917 2015 1929 1927 bottom-third 1902,1932 11 50.7 53.2 -2.5 25 98 1917 2016 1929 1928 bottom-third 1909,1942 12 51.3 53.7 -2.4 27 96 1917 2016 1929 1927 bottom-third 1921 18 45.8 49.7 -3.9 3 119 1917 2016 1917 1929 bottom-tenth 24 50.6 53.7 -3.1 9 111 1917 2016 1929 1928 bottom-tenth 1918 36 50.8 53.7 -2.9 7 111 1957 2016 1922 1929 bottom-tenth 1956 48 51.2 53.7 -2.5 15 101 1913 2016 1923 1929 bottom-third 1952 60 51.8 53.7 -1.9 29 85 1917 2016,2017,2018,2019 1925 1929 bottom-third 1908,1909,1925,1960