June in Irkutsk averages a daily high of 23.9°C with nights around 10.2°C. Expect roughly 11.8 wet days totalling 67.2mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Irkutsk is May–August.
Based on IRKUTSK, RS (5.2km), 1995–2024. 27 years of June data.