The best time to visit Dover, New Hampshire, is during the summer months, from June to August, and the fall, from September to October.Summer in Dover offers pleasant weather, with average temperatures in the 70s Fahrenheit, making it ideal for outdoor activities. You can enjoy strolls along the Cocheco River, visit the Children's Museum of New Hampshire, or explore the Dover Public Library. This period is great for families, as many local parks and attractions are fully operational, including the outdoor spaces at the Woodman Museum.Fall brings cooler temperatures, generally in the 50s and 60s Fahrenheit, and the beautiful foliage of New England. The changing leaves create a picturesque backdrop for exploring the city's historic districts.