April in Darmstadt averages a daily high of 16.7°C with nights around 3.7°C. Expect roughly 11.5 wet days totalling 43.3mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Darmstadt is May–September.
Based on DARMSTADT, GM (2.2km), 1995–2024. 29 years of April data.