October in Trier averages a daily high of 15.2°C with nights around 7.2°C. Expect roughly 13.4 wet days totalling 67.8mm. 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 October data.