When you think about it, there are so many horror films that take place during winter. Although, being from Canada, I guess I shouldn't be surprised considering when most of our classics (The Changeling, The Brood, Curtains, Black Christmas et al) were made, the snow hung around here for six months of the year. They don't call us The Great White North for nuthin'.
Anyway, I thought about it a bit and remembered an obvious one, Tom Holland's 1988 flick Child's Play.
You know, when you think about it, if Catherine Hicks hadn't been caught up in all the marketing hoopla and gone to weird - and frankly creepy - means to acquire Andy's most coveted toy, they could've saved their family years of grief. That being said, I think the real evil here is... consumerism!