What's the weather like in Xichang from June to February in 5438? How to dress appropriately?

I am in Xichang now, and the weather here is very strange. It's cold in the morning and cold at night. It's hot at noon, so you may add clothes and reduce clothes one day. The coldest time here is 165438+ October. Now, I put on a sweater, but it is very thin, depending on my physical fitness. But I haven't found how cold it is these days. It will be warmer in1February last year. Usually wear a thick coat and two clothes inside. I always wear three clothes (no sweater) when I go home (January), and only add clothes when I get home.