October in Kostroma averages a daily high of 7.6°C with nights around 1.9°C. Expect roughly 15.5 wet days totalling 63.1mm. 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. 24 years of October data.