The best time to go to Kemptville is during the summer months, from June to August, or in the early autumn, specifically September.Summer in Kemptville provides the warmest weather, making it ideal for outdoor activities and enjoying the Rideau River. You'll find many local events and farmers' markets in full swing, offering fresh produce and local crafts. It's a great time for families looking to spend time outdoors, perhaps exploring nearby provincial parks or enjoying water sports on the river.September offers a pleasant alternative with cooler temperatures and the start of autumn foliage. The crowds are typically smaller than in peak summer, and the weather is still comfortable enough for hiking, cycling, and exploring the town's shops and cafes without the intense summer heat.