I was in Prague end January last year, and was surprised that it was not cold at all. The weather was pretty good. Maybe when you walk so much u dont get cold. The city is amazing, very beautiful and the atmosphere is very pleasant as well.
havent been to the other cities unfortunately.
overall, the winter time did not at all annoy me in prague.
Thanks for the weather advice. I’m starting to feel a bit more confident about it! :)