The best time to go to St Ignace is during the summer months, from June to August, when the weather is at its warmest and most activities are available.During these months, you'll experience pleasant temperatures, typically ranging from 20°C to 27°C, which is ideal for enjoying outdoor activities like boat tours to Mackinac Island, exploring the Straits of Mackinac, and hiking in the nearby Hiawatha National Forest. The ferry services to Mackinac Island operate frequently, and all the local shops and restaurants are fully open.For those who prefer slightly cooler weather and fewer crowds, the shoulder seasons of late May or early September can also be excellent. The weather is still generally good, and you can often find better deals on accommodation.