October in Vannes averages a daily high of 17°C with nights around 12.7°C. Expect roughly 14.4 wet days totalling 71.3mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Vannes is June–September.
Based on BELLE ILE LE TALUT, FR (52.9km), 1995–2024. 30 years of October data.