Winter is the coldest season of the year, lasting from late December through February in the Northern Hemisphere (and June through August in the Southern Hemisphere). During winter, the sun sits lower in the sky and daylight hours grow shorter, causing temperatures to drop. In many places, winter brings snow, ice, and frost. Trees lose their leaves, lakes freeze over, and animals either hibernate, migrate to warmer places, or grow thick fur coats to survive.

Winter looks different depending on where you live. In Minnesota or Maine, winter means heavy snowfall, frozen ponds for ice skating, and temperatures well below freezing. In southern California or Florida, winter just means cooler days, perhaps needing a light jacket. Near the equator, there's barely any winter at all.

People have adapted to winter in creative ways throughout history. We build heated homes, wear layers of warm clothing, and store food for when crops won't grow. Many cultures celebrate festivals during winter's darkest days, like Christmas, Hanukkah, and the winter solstice, bringing light and warmth to the cold season.

The word can also describe bleakness or hardship: when someone faces a winter of difficulty, they're going through a cold, harsh period that will eventually pass, just like the season always gives way to spring.