September in Hamburg averages a daily high of 19.3°C with nights around 10.2°C. Expect roughly 12.3 wet days totalling 64.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Hamburg is May–September.
Based on HAMBURG FUHLSBUETTEL, GM (9.4km), 1995–2024. 30 years of September data.