September in Kuopio averages a daily high of 14.1°C with nights around 8.1°C. Expect roughly 13.2 wet days totalling 61.9mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Kuopio is June–August.
Based on KUOPIO SAVILAHTI, FI (2km), 1995–2024. 19 years of September data.