September in Bratsk averages a daily high of 13.3°C with nights around 4.6°C. Expect roughly 12.5 wet days totalling 40.2mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Bratsk is June–August.
Based on BRATSK, RS (18.4km), 1995–2024. 25 years of September data.