I'm going to shanghai on June 9-17. Do I need to bring an umbrella? What clothes should I bring?

Actually, it would be during the Plum Rainy Season during that time, so it is suggested to take along an umbrella. It will be hot then, with the temp ranging from 23C to 33C. Therefore, I suggest you take along summer clothes as well as a light coat to keep warm in early morning or cool nights.