I've observed wasps on days that I thought would be too cold and damp for bees.
It would certainly be a clear advantage for wasps to be able to fly in such conditions, especially in competition to bees; interesting though that the bees best defense would be then to do what they do best and be a hive, keeping the temperature up for them to remain active at the entrance for defense, which would put hives within thicker tree trunks and smaller entrance holes at a considerable advantage!
I think it's accepted that the average thickness of a tree wall in wild hives is around 100mm, that's quite a bit of insulation, throughout the entire year, especially when compared to our e.g. National Hives. When you consider that there is some evidence / thought that clustering may be a survival mechanism occurring less often in the wild than in our cuboid hives, insulation for warmth and a small entrance (less drafts & easy to defend) could play a significant part in the stronger surviving - as there's no beekeeper in the wild to feed a weak colony in a cold hive.