August in Turku averages a daily high of 21.7°C with nights around 13°C. Expect roughly 13.6 wet days totalling 83.2mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Turku is June–August.
Based on TURKU ARTUKAINEN, FI (4.8km), 1995–2024. 22 years of August data.