The best time to visit Monroe, New Hampshire, is during the summer months, from June to August, and the fall foliage season, from late September to mid-October.Families often find summer ideal for outdoor activities. The weather is warm and pleasant, great for enjoying the Connecticut River and the surrounding White Mountains. You can go hiking, kayaking, or swimming in various local spots. The longer daylight hours also allow for more exploration.For couples seeking a picturesque escape, the fall foliage season is unmatched. The hillsides transform into a stunning display of reds, oranges, and yellows. It's a prime time for scenic drives, photography, and enjoying the crisp air.