April in Barnaul averages a daily high of 11.8°C with nights around -0.3°C. Expect roughly 8.9 wet days totalling 27.7mm. 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 April data.