1991-2020 Degrees Fahrenheit 1 18.8 29.4 -10.6 5 94 1934 2017 1934 1935 bottom-tenth 2 20.8 29.1 -8.3 5 94 2015 2017 1936 1935 bottom-tenth 3 22.6 30.9 -8.3 1 97 1936 1932 1936 1935 lowest 4 27.4 34.2 -6.8 2 96 1977 1932 1936 1935 bottom-tenth 5 32.6 38.3 -5.7 2 96 1977 1932 1936 1935 bottom-tenth 6 37.5 42.8 -5.3 2 96 1977 1932 1936 1935 bottom-tenth 7 42.4 47.0 -4.6 2 96 1977 2017 1936 1935 bottom-tenth 8 46.6 50.3 -3.7 3 95 1977 2017 1936 1935 bottom-tenth 1968 9 48.7 52.3 -3.6 3 95 1977 2017 1936 1935 bottom-tenth 10 49.0 53.0 -4.0 2 96 1977 2017 1936 1935 bottom-tenth 11 48.5 52.5 -4.0 2 96 1977 2017 1936 1935 bottom-tenth 12 47.7 51.2 -3.5 3 95 1927 2017 1927 1935 bottom-tenth 18 45.4 48.4 -3.0 5 92 1979 2017 1936 1935 bottom-tenth 24 48.7 51.2 -2.5 4 93 1928 2017 1928 1935 bottom-tenth 36 48.7 51.2 -2.5 3 93 1929 2018 1929 1935 bottom-tenth 48 48.9 51.1 -2.2 3 92 1930 2019 1930 1935 bottom-tenth 60 49.7 51.1 -1.4 24 70 1981 2020 1931 1935 bottom-third 1946,1967,1969,1972