The best time to go to Johnstown, Ontario, is during the summer months, from June to August, when the weather is warm and ideal for outdoor activities.During this period, the St. Lawrence River is superb for boating, fishing, and kayaking. The average daily temperatures range from 20°C to 27°C, making it comfortable for exploring the area's parks and natural beauty. This is also when many local events and festivals take place, offering a lively experience for visitors.Couples looking for a relaxing getaway will appreciate the pleasant evenings for riverside dining and strolls. The warmer weather allows for leisurely visits to nearby historic sites like the Upper Canada Village, which often hosts special events during the summer.Families will find the summer particularly appealing due to the abundance of outdoor adventures. Children can enjoy swimming in the river, exploring nature trails, and participating in family-friendly activities often organised in the region.