The best time to go to Montpelier, Idaho, is typically during the summer months, from June to August, or in the early autumn, specifically September.Summer offers the warmest weather, with average daytime temperatures ranging from 20°C to 28°C. This period is ideal for outdoor activities such as visiting Bear Lake, which is just a short drive south, or exploring the Minnetonka Cave. The daylight hours are long, allowing for extended sightseeing and adventures. For families, this is an excellent time to visit due to school holidays and the wide range of recreational options available.September provides a pleasant alternative for those who prefer cooler temperatures and fewer crowds. The weather remains generally mild, with daytime temperatures averaging around 15°C to 22°C. The autumn foliage begins to show its colours, particularly in the surrounding Cache National Forest, offering picturesque scenery for couples or solo travellers interested in hiking or scenic drives. The town's attractions are still fully operational, but with a more relaxed pace.