1991-2020 Degrees Fahrenheit 1 36.4 39.4 -3.0 38 92 1929 1991 1975 1978 bottom-third 2 26.8 37.8 -11.0 6 124 1929 1953 1950 1978 bottom-tenth 3 27.4 36.8 -9.4 3 123 1929 1958 1949 1978 bottom-tenth 4 29.4 38.0 -8.6 3 123 1937 1967 1937 1978 bottom-tenth 5 34.0 40.9 -6.9 3 121 1937 1967,2016 1937 1978 bottom-tenth 6 38.8 45.1 -6.3 2 121 1937 1967 1937 1978 bottom-tenth 1929 7 43.4 49.4 -6.0 1 122 1979 2015 1979 1978 lowest 8 47.2 52.7 -5.5 3 120 1949 2015 1949 1978 bottom-tenth 9 49.6 54.3 -4.7 4 119 1913,1917 2016 1949 1978 bottom-tenth 1929 10 50.3 54.8 -4.5 4 119 1917 2016 1949 1978 bottom-tenth 11 50.3 54.5 -4.2 4 119 1917 2016 1949 1978 bottom-tenth 12 50.2 53.8 -3.6 5 118 1949 2016 1956 1978 bottom-tenth 18 48.3 50.9 -2.6 15 105 1917 2016 1957 1978 bottom-third 1903,1918 24 51.9 53.8 -1.9 21 99 1956 2016 1957 1978 bottom-third 36 52.0 53.8 -1.8 27 91 1957 2016,2017 1958 1978 bottom-third 1909,1920,1987 48 52.1 53.8 -1.7 28 88 1913 2016,2018 1958 1978 bottom-third 1909,1951 60 52.4 53.8 -1.4 35 79 1917 2017,2019 1973 1978 bottom-third 1973,1986