December in Kstovo averages a daily high of -4.3°C with nights around -9°C. Expect roughly 19.5 wet days totalling 60.5mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Kstovo is May–August.
Based on NIZNIJ NOVGOROD, RS (18.1km), 1995–2024. 24 years of December data.