The best time to visit Williamstown, Ontario, for pleasant weather and outdoor activities is during the summer months, from June to August.During this period, the weather is typically warm and sunny, with average daily temperatures ranging from 20°C to 27°C. This makes it ideal for exploring the Glengarry Pioneer Museum, enjoying a round of golf at the local course, or simply strolling through the village and admiring the historic architecture. Many local events and festivals also take place in the summer, offering a good opportunity to experience the community spirit.Autumn, particularly September and October, also offers a lovely experience for those who appreciate scenic beauty and cooler temperatures. The changing leaves create a beautiful backdrop, superb for photography or leisurely drives through the countryside. Temperatures are milder, ranging from 10°C to 18°C, which is comfortable for outdoor exploration without the summer heat.