October in Trenčín averages a daily high of 15.3°C with nights around 4.8°C. Expect roughly 9.7 wet days totalling 44.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Trenčín is April–September.
Based on PIESTANY, LO (34.5km), 1995–2024. 22 years of October data.