October in Barnaul averages a daily high of 9.3°C with nights around -0.4°C. Expect roughly 11.6 wet days totalling 35.5mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Barnaul is May–September.
Based on BARNAUL, RS (16.1km), 1995–2024. 27 years of October data.