Is it cruel to make your pet wear clothes?

Clothes on pets are cute. However, we live in a tropical country and putting on clothes will make our dogs uneasy and uncomfortable. In fact, that's our mortal enemy with our dogs - the hot weather. But when we go to the mountain city called Baguio City, it is a cold place of temperatures ranging from 10 to 20 degrees, it is imperative for our dogs to be clothed not only when strolling outside but also during the night. That's aside from the blanket that we cover them with for they couldn't sleep with the very cold temperature in the bedroom.