1991-2020 Degrees Fahrenheit 1 45.6 52.8 -7.2 3 98 1929 1999 1972 1975 bottom-tenth 2 51.2 58.7 -7.5 1 100 1976 2016 1976 1975 lowest 3 58.5 64.5 -6.0 1 100 1976 2016 1976 1975 lowest 4 64.7 69.4 -4.7 1 100 1976 1998 1976 1975 lowest 5 67.8 72.5 -4.7 1 100 1976 2011 1976 1975 lowest 6 69.4 73.7 -4.3 1 100 1976 2011 1976 1975 lowest 7 69.0 73.5 -4.5 1 100 1976 2011 1976 1975 lowest 8 68.3 72.2 -3.9 1 100 1976 2011 1976 1975 lowest 9 66.8 70.2 -3.4 1 100 1976 2011 1976 1975 lowest 10 65.6 67.8 -2.2 5 95 1929,1975 2011 1975 1974 bottom-tenth 1989 11 63.4 65.5 -2.1 7 93 1979 2011 1975 1975 bottom-tenth 1957,1975,1978,1982 12 61.9 63.7 -1.8 14 86 1979 2011 1975 1974 bottom-third 1959 18 65.1 67.1 -2.0 6 93 1993 2012 1975 1974 bottom-tenth 1977 24 61.7 63.7 -2.0 2 97 1979 2012 1976 1975 bottom-tenth 36 62.3 63.7 -1.4 13 85 1970 2013 1975 1974 bottom-third 1926,1942,1960,1969,1971,1993 48 62.1 63.7 -1.6 2 95 1979 2012,2013 1971 1975 bottom-tenth 1961,1970,1971,1978,1985 60 62.2 63.6 -1.4 4 92 1979 1956,2012,2013 1973 1975 bottom-tenth 1962,1970,1972,1973