December in Achinsk averages a daily high of -9.4°C with nights around -16.2°C. Expect roughly 17.2 wet days totalling 28.3mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Achinsk is June–August.
Based on ACHINSK, RS (1.3km), 1995–2024. 24 years of December data.