June in Altona averages a daily high of 21.8°C with nights around 11.8°C. Expect roughly 13 wet days totalling 73.9mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Altona is May–September.
Based on HAMBURG NEUWIEDENTHAL, GM (8.2km), 1995–2024. 30 years of June data.