Winter There are fout season in a year. Winter is one of the four season, usually being characterized for be a period of the year when there are the lowest temperatures. It's effects, though, are more intensely felt in areas of higher latitudes, that is, strips in the globe more far from the equator line. The beginning of winter is on June 21th for the south hemisphere, going up to September 23th. While, on the north hemisphere it is December 22th through march 21th. Culturally, winter is associated to christmas exactly because of the northern countries, once in the Brazil, this date occur during summer.