My printer (ender 3 V3 SE) has just finished its first winter a modern, but uninsulated garage (insulation on the ceiling but nothing else other than the cavities in the breeze blocks). I think it got down to near freezing, but not below.

Absolutely 0 issues with the printer itself. I have had 1 spool of PLA go a bit stringy due to moisture, but it was just sat in a cardboard box; I made no effort to keep it dry.