December in Pori averages a daily high of -0.3°C with nights around -5.8°C. Expect roughly 15.4 wet days totalling 47.8mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Pori is June–August.
Based on PORI PORIN LENTOASEMA, FI (1.8km), 1995–2024. 22 years of December data.