The best time to go to Dour is during the summer months, particularly in July, when the weather is at its most pleasant.July is ideal for visitors planning to attend the Dour Festival, which is the town's most significant annual event. The weather during this month is typically warm and sunny, making it comfortable for outdoor activities and enjoying the festival atmosphere. While the town itself is small, the festival attracts a large, international crowd, creating a lively environment.For those looking for a quieter visit, late spring (May and June) or early autumn (September) also offer agreeable weather without the large crowds associated with the festival.