Mackinac Island Weather in August

August is one of the excellent months to visit Mackinac Island, with daytime temperatures of 24°C (75°F) and lows of 15°C (59°F) at night. Do note that quite a bit of rainfall is typical, averaging around 85 mm (3.3 in).

Rainfall in Mackinac Island in August

Looking at the last 30 years, the data shows about 12 days with rain, averaging 85 mm (3.3 in) for the month. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.

Temperature in Mackinac Island in August

August in Mackinac Island is generally excellent, with days reaching 24°C (75°F) and nights settling around 15°C (59°F). August is part of the summer season. This kind of day-to-night contrast is typical for this time of year. At 15°C (59°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

If your ideal day consists of dry skies and pleasant temperatures, June, July and August typically offer the best circumstances for Mackinac Island.