You may have noticed that meteorologists and climatologists define seasons differently from “regular” or astronomical spring, summer, fall, and winter. So, why do meteorological and astronomical ...

Though temperatures have floated below freezing for weeks now in Illinois, winter doesn't officially begin until Sunday, Dec. 21, marking the start of the winter solstice. Here’s what to know about ...

The first day of winter in 2025 is December 21, which is the date of the winter solstice. The winter solstice marks the shortest day and longest night of the year in the Northern Hemisphere. Seasons ...

The first official day of winter in 2025 is Sunday, December 21. The winter solstice marks the shortest day and longest night of the year in the Northern Hemisphere. Winter is caused by the Earth's 23 ...