April in Willich averages a daily high of 15.8°C with nights around 5.1°C. Expect roughly 11 wet days totalling 43.2mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Willich is May–September.
Based on TONISVORST, GM (7.7km), 1995–2024. 30 years of April data.