August in Nantes averages a daily high of 25.4°C with nights around 14.3°C. Expect roughly 9.7 wet days totalling 49.4mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Nantes is May–September.
Based on NANTES BOUGUENAIS, FR (8.6km), 1995–2024. 30 years of August data.