What will be tempreture during 21st April to 27th April in Nanjing & Shanghai to carry cloths??

Hi, as for NJ city, the temperature will range from around 12C to 26C. It would be suuny as well. I suggest you take along a jacket and jeans. Well, shanghai may be a little cooler that NJ, with the average temperature of around 18C. Anyway, it might be a little hot in sunny afternoon, when the long-sleeved shirt will help.