The best time to go to Haverhill is during the late spring, summer, and early autumn months, from May through October, for the most pleasant weather and a full range of outdoor activities.During these months, the weather is generally warm and inviting, great for enjoying the city's parks, the Merrimack River, and the various community events. You'll find average temperatures ranging from 15°C to 28°C, making it comfortable for exploring.Families will particularly enjoy visiting Haverhill in the summer. This period offers ample opportunities for outdoor fun, such as kayaking or paddleboarding on the Merrimack River, visiting Plug Pond for swimming, or exploring the trails at Winnekenni Park. Many local festivals and farmers' markets also take place during these months, adding to the community feel.Couples looking for a relaxing getaway might prefer late spring or early autumn. The crowds are typically smaller than in peak summer, and the weather remains delightful.