To be honest I've nothing wrong with a Predator being taken outside its comfort zone. Where's the fun in not challenging themselves? It's not like the don't already have massive advantages. That's one of the things I did kind of like about AvP. It's an added challenge.
Predators aren't stupid, they know how to keep warm in cold environments. And some would certainly appreciate the added challenge a colder climate brings.
And even if they aren't keeping warm, it adds to their durability and toughness. They prefer warmth, but they can handle the uncomfortable cold, it shows dedication to hunting that one bastard who chose to live in a cold environment.
Who cares if by so called "canon", they've been hunting in warm climates. What stops them from going to a colder one? I'd still love to see them hunt in a desert, all that dust could make cloaking challenging. But I am not against a cold environment. I'm all for seeing Predators in new and interesting settings rather than have fifty films set in a scorching humid jungle... you can only tell so many stories in the same cycle before it gets repetitive and stale.
Predator as a franchise should never be afraid to try new things.