The figure came in stronger than expected by analysts, who had forecast a 2.6-percent increase in Polish industrial production last month, state news agency PAP reported.
Prime Minister Donald Tusk welcomed the data in a post on X, saying: "Well, that’s quite a surge. As I said, 2026 will be a year of acceleration."
In month-on-month terms, Polish industrial production in December was 0.1 percent lower than in November, the Statistics Poland (GUS) agency said.
Meanwhile, the country's seasonally-adjusted industrial production increased by 4.7 percent in year-on-year terms in December, while rising 2.1 percent month on month, according to the state-run statistics office.
According to the European Union's Eurostat statistics agency, which uses a different methodology, Poland's seasonally-adjusted industrial production had fallen 0.6 percent in November compared with the same month in 2024.
(gs)
Source: IAR, PAP