I am thinking of visiting Beijing, Shanghai in November what is the weather like.

In Shanghai, the average temperature at that time is about 15-20 centigrade degree and it is not humid. So it is best time to visiting Shanghai.
In Beijing, the average temperature is about 10 centigrade degree. If you visit Beijing in the early November, the weather is cool but in the late November, you may fee cold in Beijing. It will be dry in Beijing at that time. In generally, it is still a good time to travel in China.