Cold, because you can easily compensate it with warm clothes.
Warm weather on the other hand...
Go to Winnipeg in January. No matter how many layers of warm clothes you find its still unbearable to be outside.
Also when its hot, you can easily compensate it with water rights with attractive boys.
Cold weather all the way! I hate how on hot weather you will sweat no matter what, besides more bugs tend to appear and I hate them, I love the sunshine but that's about it.