Why Is It ?

Why is it that when it's really cold with the windblowing super hard you get tired so easy? It seems like I just start to do something and I'm ready for a break.I guess it's because you have to wear so much heavier clothes when you're outside. That makes it harder to just move around let alone do anything that takes any effort. I just don't like the cold weather and can't figure out why I moved back to it years ago when I was living in California. I guess we all make mistakes sometime in our lives maybe that was mine.