September in Achinsk averages a daily high of 14.6°C with nights around 5.6°C. Expect roughly 14.4 wet days totalling 50.4mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Achinsk is June–August.
Based on ACHINSK, RS (1.3km), 1995–2024. 30 years of September data.