December in Rubtsovsk averages a daily high of -8.4°C with nights around -17.3°C. Expect roughly 10.6 wet days totalling 18.6mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Rubtsovsk is May–June.
Based on RUBCOVSK, RS (1.8km), 1995–2024. 25 years of December data.