The best time to visit Lowell is during the spring (April to June) and autumn (September to October) months, when the weather is mild and pleasant for exploring.Spring in Lowell brings comfortable temperatures, typically ranging from 10°C to 20°C. This is an ideal time for outdoor activities, such as walking along the Merrimack River or exploring the Lowell National Historical Park without the summer heat or winter chill. Many local gardens and parks are in full bloom, adding to the city's appeal.Autumn offers similarly agreeable weather, with temperatures usually between 10°C and 18°C. The changing foliage provides a beautiful backdrop for sightseeing, particularly around the city's canals and historic mill buildings. You'll also find various autumn festivals and events taking place, offering a deeper look into the local culture.While summer (July and August) can be warm and humid, with temperatures often exceeding 25°C, it's still a popular time to visit, especially for families. The city offers many outdoor events and activities during these months, including boat tours on the canals.