weather in Shanghai and Beijing

It would be during the middle to late Oct.
For Beijing, the averagre temperature could be about 5 C and the lowest temperature could be -5 C. Therefore, the warm clothes are needed, such as wool sweater and the thick overcoat.
For Shanghai, the mild sunshine during that time makes this season good for traveling. The average temperature would be around 15 C. Long-sleeved shirts and thin coat are appropriate.