January in Kostanay averages a daily high of -10.6°C with nights around -19.5°C. Expect roughly 10.1 wet days totalling 16.5mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Kostanay is May–September.
Based on KUSTANAI, KZ (0.6km), 1995–2024. 12 years of January data.