The best time to go to Exeter, Ontario, is during the summer months, from June to August, for warm weather and outdoor activities, or in the autumn, from September to October, for pleasant temperatures and fall foliage.Summer in Exeter offers the warmest temperatures, typically ranging from 20°C to 27°C (68°F to 80°F). This is ideal for enjoying the local parks, exploring the Morrison Dam Conservation Area, or visiting nearby Grand Bend Beach on Lake Huron, which is about a 20-minute drive away. Families will find this period particularly appealing for outdoor adventures and water-based fun.Autumn brings cooler, comfortable temperatures, averaging between 10°C and 20°C (50°F to 68°F), and the countryside transforms with vibrant fall colors. This season is superb for couples or solo travelers who appreciate scenic drives and exploring the area's quieter trails. Local farms often host harvest festivals during this time, offering a taste of local produce and community events.