June in Viersen averages a daily high of 23°C with nights around 12°C. Expect roughly 12.1 wet days totalling 71.2mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Viersen is May–September.
Based on TONISVORST, GM (5.4km), 1995–2024. 30 years of June data.