April in Kouvola averages a daily high of 8.7°C with nights around -0.8°C. Expect roughly 10 wet days totalling 31.1mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Kouvola is May–August.
Based on KOUVOLA UTTI LENTOPORTINTIE, FI (13.5km), 1995–2024. 30 years of April data.