September in Lünen averages a daily high of 20.5°C with nights around 9.7°C. Expect roughly 11.2 wet days totalling 53.6mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Lünen is May–September.
Based on LUDINGHAUSEN BROCHTRUP, GM (16.9km), 1995–2024. 21 years of September data.