[@BBeast] I believe Cyclone mentioned something about the tilt and severe weathers and whatnot. What I got from him is: winters are longer and much colder than those on earth.  The -130 was meant to reflect that. The polar regions of Galbar are meant to be much bigger than those of earth, so I guess the farther north or south you go the colder it would be, and so the foremost north and formost south are probably where we'd see temperatures south of -90. Likewise, summers are hotter, which is why Galbar's highest temperatures are also higher than those of earth - I'm guessing those would occur in the Firewind and Changing Plains.

Edit: If I went overboard though, I don't mind changing those stats as none of it has truly been canonised - it's just from our general discussions.