Tomb-Sweeping Day goes to Wuzhen. What's the temperature there now and what clothes to wear?

Two years ago, Tomb-Sweeping Day went to Wuzhen, thinking that Jiangnan would be warm in spring, so he wore a skirt that could be worn in spring and autumn, which froze me to death. Be sure to wear two clothes, and it is better to have a thicker coat, such as a sweater or something with velvet. And the temperature difference between morning and evening is also great. If it is a thin coat, it will feel cold at night.