September in Lahr averages a daily high of 21.7°C with nights around 10.1°C. Expect roughly 10.6 wet days totalling 58mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Lahr is May–September.
Based on LAHR, GM (4.1km), 1995–2024. 30 years of September data.