April in Hannover averages a daily high of 14.5°C with nights around 4°C. Expect roughly 10.9 wet days totalling 34.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Hannover is May–September.
Based on HANNOVER, GM (11.2km), 1995–2024. 30 years of April data.