September in Gorno-Altaysk averages a daily high of 19.4°C. Expect roughly 12.7 wet days totalling 49.4mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Gorno-Altaysk is May–September.
Based on CEMAL, RS (58.9km), 1995–2024. 26 years of September data.