Mackinac Island Weather Forecast
- 57
- 68
Partly Sunny
- 56
- 67
Mostly Sunny
- 57
- 70
Mostly Sunny
- 58
- 73
Partly Sunny
- 54
- 71
Slight Chance Rain Showers
- 51
- 63
Slight Chance Rain Showers
- 52
- 61
Partly Sunny
Today 14 Sep Mackinac Island/Bois Blanc Island
Partly sunny. Highs in the lower 70s. East Winds 5 to 10 Mph.
Tonight 14 Sep Mackinac Island/Bois Blanc Island
Mostly clear. Lows in the mid 50s. Southeast Winds 5 to 10 Mph.
Mackinac Island Temperature Statistics
September Temperature
Mackinac Island Airport (0 miles)
Lowest 8 September, 2025
42.8 °FAverage September
58 °FHighest 1 September, 2025
73.4 °F
Climate (2020–Present)
Mackinac Island Airport (0 miles)
Average Low 2020–2025
38.4 °FAverage 2020–2025
44.8 °FAverage High 2020–2025
51.2 °F