Aww man we get a beautiful a winter in California. It fluctuates daily from 50-30 degrees its so nice though. Were lucky to get the cold days where it sunny and the the dark cold days california is a huge state so it greatly varies. the winters are pretty mild with temperatures hardly ever getting below 40 but usually between 40-50 degrees. sometimes will be below freezing but not for more than a few days at a time. but there are mountains that reach well below freezing and have snow on them for a while it gets really cold in, i've live there and i was never cold, a light jacket and you will be fine, not like Alaska.