September in Kstovo averages a daily high of 16.3°C with nights around 8.4°C. Expect roughly 11.8 wet days totalling 58.8mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Kstovo is May–August.
Based on NIZNIJ NOVGOROD, RS (18.1km), 1995–2024. 24 years of September data.