December in Salo averages a daily high of 0.6°C with nights around -4.7°C. Expect roughly 14.8 wet days totalling 52.4mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Salo is June–August.
Based on SALO KARKKA, FI (1.5km), 1995–2024. 30 years of December data.