June in Biysk averages a daily high of 25.1°C with nights around 11.8°C. Expect roughly 11.5 wet days totalling 55.5mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Biysk is May–September.
Based on BIJSK ZONALNAJA, RS (23.2km), 1995–2024. 30 years of June data.