Winter is often defined by meteorologists to be the three calendar months with the lowest average temperatures. This corresponds to the months of December, January and February in the Northern Hemisphere, and June, July and August in the Southern Hemisphere.

The meaning of WINTER is the season between autumn and spring comprising in the northern hemisphere usually the months of December, January, and February or as reckoned astronomically extending from the December solstice to the March equinox.

Winter - Winter Solstice Winter has the coldest weather of the four seasons as the days become shorter and colder with snow dropping in the coldest areas. In the Northern Hemisphere winter comes in the December, January, and February months and in the Southern Hemisphere it comes in the June, July and August months.

Check out the Azusa, CA WinterCast. Forecasts the expected snowfall amount, snow accumulation, and with snowfall radar.

And when the South Pole tilts toward the Sun, it's winter in the Northern Hemisphere. Earth’s tilted axis creates seasons. When the North Pole is pointing toward the sun, there is more sunlight reaching the northern half of the planet, leading to summer. When it is pointing away, there is less sunlight, leading to winter.

Astronomically, the First Day of Winter occurs at the Solstice, around the 21st of December. However, meteorologically, the season begins three weeks earlier, on the 1st of December.