Seasons are caused by the relative orientation of the earth with the sun. The tilt of the earth causes seasons. Are you saying that Jesus is the cause of snow in the winter time? I don't think so. The seasons are less significant in tropical areas such as the holy land (where Jesus spent his entire life) and their effect is inverted when you get into the southern hemisphere.
Season: noun
5. a period of the year immediately before and after a special holiday or occasion: “the Christmas season.”