1991-2020 Degrees Fahrenheit 1 37.1 36.6 0.5 59 39 1960 2012 1934 1935 normal 2 27.9 33.0 -5.1 11 87 1934 2012 1934 1935 bottom-third 3 26.2 31.6 -5.4 8 90 2015 2012 1934 1935 bottom-tenth 4 26.2 32.4 -6.2 3 94 1978 2012 1934 1935 bottom-tenth 1934 5 29.4 34.7 -5.3 4 93 1934 2012 1934 1935 bottom-tenth 1978 6 33.3 38.0 -4.7 4 93 1934 2012 1934 1935 bottom-tenth 7 37.4 42.0 -4.6 2 95 1934 2012 1934 1935 bottom-tenth 8 41.7 45.7 -4.0 3 94 1934 2012 1934 1935 bottom-tenth 1978 9 45.5 48.7 -3.2 6 91 1977 2012 1934 1935 bottom-tenth 2014 10 47.5 50.7 -3.2 3 94 1977 2012 1934 1935 bottom-tenth 1934,1959,1963,2015 11 47.9 51.5 -3.6 2 95 1977 2012 1936 1935 bottom-tenth 12 47.5 51.2 -3.7 1 96 1936 2012 1936 1935 lowest 18 43.8 46.8 -3.0 5 91 1941 2017 1936 1935 bottom-tenth 24 49.0 51.2 -2.2 8 88 1978 2017 1930 1935 bottom-tenth 1930,1982 36 48.8 51.1 -2.3 3 92 1979 2018,2022 1929 1935 bottom-tenth 48 49.0 51.1 -2.1 3 91 1980 2019,2022 1930 1935 bottom-tenth 1981 60 49.8 51.1 -1.3 28 65 1981 2020 1931 1935 bottom-third 1948,1960,1964,1984