He might not play out in the snow for hours on end, but there’s no reason he’d be unable to go out and enjoy it. After all, even small animals live out in the cold. Sam could even make himself a little igloo if he needed to find shelter for a night, with snow being a natural insulator. An hour or two out with big brother and he might be cold, but he probably wouldn’t even notice most of the time. The same way we don’t notice when we’re having fun how cold we are.