April in Ahlen averages a daily high of 15.2°C with nights around 4.4°C. Expect roughly 10.4 wet days totalling 39.8mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Ahlen is May–September.
Based on WERL, GM (20.6km), 1995–2024. 21 years of April data.