September in Lübeck averages a daily high of 19.5°C with nights around 9.3°C. Expect roughly 12 wet days totalling 50.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Lübeck is May–September.
Based on LUBECK BLANKENSEE, GM (6.6km), 1995–2024. 30 years of September data.