September is the most popular time to visit Cornwall, where visitors flock to enjoy the stunning autumn scenery and mild temperatures. The peak season, from July to September, showcases the best of what Cornwall has to offer, with vibrant festivals, outdoor activities, and beautiful beaches. During these months, you can relish the warm weather, great for hiking along the picturesque trails or relaxing by the tranquil lakes.In September, daytime temperatures typically range from 10 to 20 degrees Celsius, creating a comfortable environment for sightseeing and outdoor adventures. This is also when you can witness the beautiful transition of the leaves, making it a great time for photography enthusiasts and nature lovers alike. The crowds start to thin out compared to the bustling summer months, allowing for a more relaxed experience while exploring local attractions.For those looking for more budget-friendly options, November offers a quieter charm, with fewer tourists and the opportunity to enjoy the serene beauty of the landscape. Although temperatures are cooler, ranging from 0 to 10 degrees Celsius, this month provides an excellent chance to experience Cornwall's tranquil countryside and cosy local cafes.Ultimately, your ideal time to visit Cornwall depends on whether you prefer the vibrant setting of the peak summer months or the peaceful allure of autumn and early winter.