April in Trier averages a daily high of 15.6°C with nights around 4.9°C. Expect roughly 11.1 wet days totalling 44.8mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Trier is May–September.
Based on TRIER PETRISBERG, GM (1.6km), 1995–2024. 30 years of April data.