August in Kotlas averages a daily high of 20.3°C with nights around 10°C. Expect roughly 14 wet days totalling 62.9mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Kotlas is June–August.
Based on KOTLAS, RS (4.3km), 1995–2024. 29 years of August data.