December in Norrköping averages a daily high of 2.3°C with nights around -2.5°C. Expect roughly 14.2 wet days totalling 43.3mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Norrköping is May–September.
Based on NORRKOPING SMHI, SW (2.5km), 1995–2024. 30 years of December data.