Did people in the middle ages bathe in the winter?

Surprising as it might seem, "cleanliness is next to godliness" was a common idea in the middle ages, so people in towns and cities tended to bathe frequently. Physicians of the time connected bad smells with disease, clergy believed a clean body was an indicator of a good soul.

People bathed in public baths in the towns and cities, and this was a bit problematical at the time, since it meant a certain amount of public nudity, which was not thought good. The public baths were equipped with wooded tubs or were in the ground. Hot springs provided hot water, where it was available. Where there were no springs, people could heat water and put it in the tub in winter, or they could bathe in the cold.

Later, as the Renaissance set in, people had more access to perfume and clean clothes, and tended to clean only those parts of the body that showed, unless they got very dirty somehow.