Why is it windy when it is cold in the south? It's windy and really annoying.

Because of the latitude difference, the climate difference between north and south is caused. The dividing line between the north and the south is the Qinling Huaihe River, with the south as the south and the north as the north. The difference is:

The south is dominated by tropical monsoon climate and subtropical monsoon climate, with hot and rainy summer and cold and windy winter.

We can only keep warm because of the climate difference.