June in Helsinki averages a daily high of 19.4°C with nights around 11.6°C. Expect roughly 10.8 wet days totalling 57.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Helsinki is June–August.
Based on HELSINKI KAISANIEMI AWS, FI (0.9km), 1995–2024. 30 years of June data.