Having lived high in the Rocky Mountains and in Singapore (and various intermediate climes), it's my personal impression that "hot" people have a harder time in cold weather than "cold" people have in hot weather. Aircon is great! The thing is, you can adjust. When I visited central India with an Indian-American friend, both of us were in short-sleeved shirts the whole time, while his family were bundled in all the sweaters and coats they had and were still cold. (It was late January I believe.)
