August in Barnaul averages a daily high of 24.6°C with nights around 11.8°C. Expect roughly 10.9 wet days totalling 41.2mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Barnaul is May–September.
Based on BARNAUL, RS (16.1km), 1995–2024. 28 years of August data.