January in Kostroma averages a daily high of -6.4°C with nights around -12.3°C. Expect roughly 18.9 wet days totalling 38.7mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Kostroma is May–August.
Based on KOSTROMA, RS (5.9km), 1995–2024. 25 years of January data.