October in Montreuil averages a daily high of 17.5°C with nights around 9.8°C. Expect roughly 15.9 wet days totalling 54.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Montreuil is May–September.
Based on PARIS MONTSOURIS, FR (9km), 1995–2024. 21 years of October data.