Winter typically lasts for about 89 to 93 days, depending on the year and the specific definition of winter. In the Northern Hemisphere, winter officially begins with the Winter Solstice, which usually occurs around December 21st, and ends with the Spring Equinox, around March 20th. This period is known as astronomical winter.
However, meteorological winter is defined by the three coldest months of the year, which are December, January, and February. This definition is often used for simplicity and consistency in weather forecasting and climate studies.
In summary, winter lasts approximately 89 to 93 days, but the exact number can vary slightly each year.