How many days does winter last?

Your question refers to the duration of winter. Winter's length varies according to the geographical location, climatic zone, and astronomical seasons, rather than a fixed number of days.

Astronomical Winter: In the astronomical sense, winter begins with the winter solstice and ends with the spring equinox. In the Northern Hemisphere, the winter solstice usually occurs around December 21 or 22, marking the shortest day of the year. It ends with the spring equinox, on or around March 20 or 21, signaling the beginning of spring. So, astronomical winter lasts about 89 to 90 days.

Meteorological Winter: In meteorology, winter is often defined based on average temperatures rather than astronomical dates. Different meteorological agencies may use slightly varying criteria, but generally, winter is considered to start when average daily temperatures consistently fall below a certain threshold (e.g., below 0°C or 32°F) and last until temperatures start rising consistently. Depending on the region, meteorological winter can start and end on different dates compared to astronomical winter.

Regional Winter: In various regions around the world, winter may have different durations and varying characteristics. In high-latitude areas like Canada and northern Russia, winter can be extended with prolonged cold temperatures and snowfall. In temperate regions such as parts of the United States, Europe, and Asia, winters are milder and shorter in comparison. Tropical and subtropical regions generally have no distinct winter season, with warm weather prevailing throughout the year.