May in Hamburg averages a daily high of 18.1°C with nights around 7.6°C. Expect roughly 12.6 wet days totalling 59.9mm. 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 May data.