1991-2020 Degrees Fahrenheit 1 53.9 51.5 2.4 97 32 1927 1936 1968 1966 top-third 2 51.1 46.9 4.2 117 12 1975 1934 1968 1949 top-tenth 3 42.2 42.6 -0.4 63 66 1975 1910 1968 1966 normal 1902,1923,1957,1966,1977 4 35.3 38.5 -3.2 28 101 1899 1934 1967 1968 bottom-third 5 27.3 35.8 -8.5 4 125 1899,1982 1934 1899 1968 bottom-tenth 6 25.1 34.1 -9.0 1 127 1969 1992 1969 1968 lowest 7 26.4 34.0 -7.6 2 126 1979 1992 1969 1968 bottom-tenth 1978 8 28.8 35.4 -6.6 3 124 1899 1987 1899 1968 bottom-tenth 9 31.7 37.8 -6.1 3 124 1899 1992 1899 1968 bottom-tenth 1978 10 34.8 40.7 -5.9 3 124 1899 1992 1899 1968 bottom-tenth 1979 11 37.6 43.2 -5.6 3 124 1899 1992 1899 1968 bottom-tenth 1979 12 39.3 44.5 -5.2 2 125 1899 1934 1899 1968 bottom-tenth 18 37.1 41.0 -3.9 6 120 1979 2016 1952 1968 bottom-tenth 1950 24 42.1 44.5 -2.4 21 104 1979 2016 1966 1968 bottom-third 1923,1928 36 42.3 44.5 -2.2 17 106 1952 2017 1967 1968 bottom-third 1901,1914,1949,1970 48 42.4 44.6 -2.2 12 109 1952 2016 1954 1968 bottom-tenth 1909,1912,1914,1920,1954,1981 60 42.2 44.6 -2.4 7 112 1952 2016 1954 1968 bottom-tenth 1907,1913,1917,1954,1979