> If the difference between the best winter and the worst is a 40% longer duration (admittedly, not pleasant) and 15 degrees centigrade... there's plenty of roo

> If the difference between the best winter and the worst is a 40% longer duration (admittedly, not pleasant) and 15 degrees centigrade... there's plenty of room left for real variation. ;) But if you do allow for that larger variation, you will soon run out of people to observe it. Long-lasting supplies scale somewhat linearly, but if you want to have fresh meat at the end of the winter, too, you will need quadratically more fodder at the beginning of winter to feed the animals, for example.