1991-2020 Degrees Fahrenheit 1 28.1 31.6 -3.5 42 81 1978 2017 1936 1935 normal 2 26.5 29.3 -2.8 39 84 1979 2017 1936 1935 bottom-third 1945 3 28.9 30.2 -1.3 58 64 1978 1932 1936 1935 normal 1971 4 31.0 33.3 -2.3 40 82 1977 1932 1936 1935 bottom-third 1925 5 35.7 37.7 -2.0 38 84 1977 1932 1936 1935 bottom-third 1989 6 41.5 42.6 -1.1 60 62 1977 1932 1936 1935 normal 1975 7 47.2 47.1 0.1 85 37 1977 1932 1936 1932 top-third 1941 8 51.8 50.7 1.1 104 18 1977 1932 1936 1932 top-third 9 54.2 53.1 1.1 105 17 1918 1932 1936 1935 top-third 1931,1934,1972,2020 10 55.5 54.2 1.3 108 14 1918 1932 1936 1935 top-third 1939,2000,2008,2013 11 54.9 54.2 0.7 101 21 1918 1932 1936 1935 top-third 12 53.9 53.2 0.7 102 20 1918 2017 1936 1932 top-third 1955,2011,2018 18 48.1 49.6 -1.5 39 81 1905 2017 1936 1935 bottom-third 1946,1964 24 51.7 53.1 -1.4 36 84 1905 2017 1936 1936 bottom-third 1936 36 52.4 53.1 -0.7 63 55 1905 2018 1936 1935 normal 1965,1967,1973,1983,1994 48 52.7 53.1 -0.4 74 42 1905 2019 1936 1935 normal 1945,1949,2004,2010,2015 60 52.6 53.1 -0.5 67 47 1906 2020 1928 1936 normal 1946,1949,1955,1960