December in Bielsko-Biala averages a daily high of 0.6°C with nights around -6.4°C. Expect roughly 16 wet days totalling 82.3mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Bielsko-Biala is June–August.
Based on ORAVSKA LESNA, LO (51.4km), 1995–2024. 26 years of December data.