The first contender is astronomical winter. This one is for the nerds. It’s based on the Earth’s tilt and our orbit around the sun. Basically, it’s the posh, calendar-based version.
Astronomical winter starts on the winter solstice. That’s the day with the shortest daylight and the longest night. For the UK in 2026, that magical moment falls on Sunday, 21 December 2026. Mark it in your diary with a sad emoji.
And when does it end? Around the spring equinox, which is 20 March 2026. So you get to be gloomy until nearly spring. Fabulous. But is this the “official” start? Well, the Royal Observatory Greenwich says yes, and they’re basically the wizards of time. So, listen to them.
Meteorological Winter (The Practical One)
But wait! The weather forecasters are having none of that solstice nonsense. They live in the real world. They don’t want to count calendar days in a confusing way. They invented meteorological winter.
This version is far simpler. It’s all about neat, tidy months. Meteorological winter always starts on 1 December. Yes, every single year. It just runs from December through January and February. Boom. Done.
Why do they do this? Because it’s easier to compare weather data. You know, for statistics and graphs and boring stuff. But for you and me, it means that by 1 December, you can officially complain about the cold without anyone saying, “Well, technically it’s still autumn.”
