March in Kotka averages a daily high of 0.8°C with nights around -4.7°C. Expect roughly 10.2 wet days totalling 32.7mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Kotka is June–August.
Based on KOTKA RANKKI, FI (10.2km), 1995–2024. 30 years of March data.