Heavy snowfall hampered road traffic in the southern Małopolska and Silesia regions on Saturday night, Polish state news agency PAP reported.
Snow clearing vehicles worked overnight into Monday to ensure roads remained passable, according to officials.
In the Silesia region, some trains were delayed by over 100 minutes; others were cancelled and replaced by bus service, the PAP news agency reported.
Due to heavy snowfall from Friday, flights from the region's Katowice Airport were delayed by up to 2 hours on Saturday, according to the authorities.
In Kraków, the capital of the Małopolska region, some streetcar and bus lines had to be shortened or rerouted on Sunday morning, due to snow-covered tracks and roads, officials said.
Winter weather was set to continue in southern Poland this week, with temperatures of around minus 15 Celsius forecast for both Katowice and Kraków, private broadcaster Polsat News reported.
Source: PAP, Polsat News, IMGW