April in Vaasa averages a daily high of 7.6°C with nights around -1.2°C. Expect roughly 10 wet days totalling 25.3mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Vaasa is July–August.
Based on VAASA VAASAN LENTOASEMA, FI (9.8km), 1995–2024. 17 years of April data.