I will be going to Beijing on 30oct-3nov and Shanghai on 6-10nov

Currently, it is hard to tell you the exact information this year, because it is still so early and only a general information can be told.
According to the past records, the average temperature is around 5 to 12C, however, if you meet the cold air, the temperature will become lower.
It is suggested to take the thick sweaters and a thin coat, or a T-shirt and thick coat.