Find hotels in Boulder, MT from £51

The most popular time to visit Boulder is during the summer months, particularly in July. This is when the weather is at its most inviting, with average temperatures around 27°C, making it great for outdoor adventures and exploration. With the sun shining brightly, visitors can fully enjoy the stunning views of the Flatirons and the vibrant atmosphere of the Pearl Street Mall.During the peak season, from June to August, Boulder comes alive with a number of festivals, outdoor events, and recreational activities. Enthusiasts of hiking, mountain biking, and rock climbing will find this period particularly exhilarating, as the nearby trails are luscious and accessible. The long daylight hours provide ample time to partake in these activities, allowing you to truly immerse yourself in the natural beauty that Boulder has to offer.If you're considering a more tranquil experience, September can be an excellent alternative. The crowds begin to thin, yet the weather remains pleasant, with daytime temperatures typically around 22°C. This is a fantastic time for those who enjoy a quieter atmosphere while still being able to partake in outdoor pursuits or visit local attractions without the hustle and bustle of high season.