I don't think humans -or primates in general - are set up to hibernate. It's a very specialized and prolonged physiological state, and only some mammals can do it. It's been a long time since I studied this material (way back in some college course on environmental adaptations), but we evolved in Africa, where food, etc. is available year-round and there's pretty much no point to hibernation.
Doesn't mean we don't get sleepier in the winter, but that's different.
Edit: I was curious where mammals in general first evolved - looks like it was in the north.
http://science.nationalgeographic.com/s ... e-mammals/
Based on the known fossil record, scientists believed that the ancestors of mammals alive today emerged in the north, and then migrated south, all the way to Antarctica and Australia, as land bridges episodically developed between the continents.
And it looks like a couple of primates (all lemurs in Madagascar) do hibernate - though a little differently than animals in cold climates. Apparently, they live in a climate where their usual food and water sources are in short supply for several months. http://today.duke.edu/2013/05/hibernation