August in Metz averages a daily high of 23.9°C with nights around 14°C. Expect roughly 12.9 wet days totalling 70.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Metz is June–September.
Based on BERUS, GM (40.8km), 1995–2024. 29 years of August data.