I'm playing a world in its 3rd winter, and most parts of the world have very little snow cover, much less than in the previous years. This is despite the rainfall reading of "Common". In the attached screenshot, I'm standing in an area with common rainfall, same as the snow covered area. Month is January, and temperature currently stays well below 0. So, my expectation would be that the world covered by snow, but it isn't. It's also of note that I had this world since 2024, and it has gone through several game versions. The lack of snowfall was first visible in 1.21.0.
Am I just unlucky, or is there something more to it?