December in Semey averages a daily high of -7.3°C with nights around -15.6°C. Expect roughly 11.9 wet days totalling 19.8mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Semey is August–September.
Based on SEMEJ, KZ (3.6km), 1995–2024. 19 years of December data.