May in Erfurt averages a daily high of 17.8°C with nights around 7.5°C. Expect roughly 11.8 wet days totalling 65.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Erfurt is June–September.
Based on ERFURT BINDERSLEBEN, GM (5.1km), 1995–2024. 30 years of May data.