1991-2020 Degrees Fahrenheit 1 55.4 53.2 2.2 111 13 1919 1950 1932 1933 top-third 2 61.6 60.2 1.4 111 13 1912 2015 1932 1933 top-third 2018 3 65.5 65.5 0.0 101 23 1912 2015 1932 1933 top-third 1963 4 68.6 69.0 -0.4 99 25 1912 2003 1932 1933 top-third 2019 5 69.7 69.8 -0.1 101 23 1912 2018 1932 1933 top-third 6 67.2 68.5 -1.3 85 39 1912 2018 1932 1933 top-third 1991 7 63.9 66.1 -2.2 65 59 1912 2018 1932 1931 normal 1901,1946 8 60.9 63.5 -2.6 63 61 1912 2012 1932 1931 normal 1959,1962 9 55.6 60.3 -4.7 12 112 1917 2012,2018 1929 1932 bottom-tenth 1905,1906 10 51.7 57.1 -5.4 10 114 1917 2012,2018 1929 1932 bottom-tenth 11 48.7 54.4 -5.7 7 116 1917 2018 1929 1932 bottom-tenth 12 47.7 53.2 -5.5 8 115 1917 2018 1929 1932 bottom-tenth 18 53.3 58.3 -5.0 9 114 1917 2018 1929 1932 bottom-tenth 24 47.9 53.2 -5.3 6 116 1913,1917 2018 1930 1932 bottom-tenth 1921,1949 36 48.7 53.2 -4.5 14 107 1917 2018 1931 1932 bottom-third 1922,1949,1950 48 48.6 53.1 -4.5 11 109 1920 2018 1932 1931 bottom-tenth 60 48.3 53.1 -4.8 7 112 1917 2018,2019,2021 1921 1932 bottom-tenth 1915