Why does it often rain in autumn in Wenzhou?

Generally speaking, the weather characteristics and autumn atmosphere in Wenzhou are relatively stable. The sky in the south is always warm and humid, and it will rain when it meets cold air. When the cold air in the north is active in autumn, the weather in Wenzhou will be rainy and rainy, and so will the winter. If the cold air is not very strong, it will hardly snow, but it will rain.