When Is Winter 2024 In Usa. Winter officially begins in the northern hemisphere on saturday, dec. Winter 2024 starts on saturday, december 21st in the northern hemisphere, with the first day of winter being the shortest daylight day of the year with the earth's axis having reached its furthest tilt away from the sun and begins to change directiion back.
Here is a basic explanation of how astronomers and meteorologists. The date on your calendar when winter begins is known as the winter solstice.