May in Montreuil averages a daily high of 20.8°C with nights around 10.8°C. Expect roughly 12.4 wet days totalling 68.5mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Montreuil is May–September.
Based on PARIS MONTSOURIS, FR (9km), 1995–2024. 22 years of May data.