Winter is one of the four temperate seasons, typically characterized by the coldest weather of the year. It occurs between autumn and spring and is marked by shorter days and longer nights. Meteorologically, winter is defined by the occurrence of freezing temperatures and, in many regions, snowfall. In the Northern Hemisphere, winter generally spans from December to February, while in the Southern Hemisphere, it occurs from June to August.

Winter significantly affects the natural environment, influencing the behavior of animals, the growth cycle of plants, and human activities. In various cultures, winter is associated with specific holidays and traditions, often emphasizing themes of warmth, family, and togetherness amid the cold.

Different regions experience winter in varying ways; for instance, tropical areas may not have a true winter season, whereas polar regions endure extreme cold and prolonged darkness. The term “winter” can also evoke imagery and connotations of bleak or serene landscapes, as well as metaphorical uses related to decline or dormancy.