January in Kotlas averages a daily high of -9.3°C with nights around -16.2°C. Expect roughly 19.7 wet days totalling 36.9mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Kotlas is June–August.
Based on KOTLAS, RS (4.3km), 1995–2024. 25 years of January data.