I will be living in Krakow next year, and it's quite a big city, so I might need to get a bike to get around. How bad is it to ride a bike, especially during winter? Is the snow going to be a problem?
I live in Wrocław, not Kraków, so I can't tell you anything about the city specifics.
About the winter - recently winters in Poland are mostly snow-less and the temperature usually doesn't fall very low as well. There's a lot of rain, water, puddles and mud though. I think cycling should be kinda possible for most of the winter but I wouldn't expect it to be very pleasant. I, for one, use my bike as much possible in summer but definitely prefer public transportation during winter.