Weather by month
Mackinac Island
Michigan
An island with no cars, a summer that arrives late and leaves early, and a winter that shuts the door behind it.
The best time to come
September is the one to aim for: everything still running, the ferries no longer packed, and the light over the straits at its best. June brings the lilacs and cool clear air, while August is the only stretch when swimming off British Landing is a real option rather than a dare.
The year at a glance
| Month | Highs / lows | Temperature range | Wet days | Water |
|---|---|---|---|---|
| January | 27° / 9° | 15 | 33° | |
| February | 29° / 7° | 11 | 33° | |
| March | 39° / 16° | 10 | 33° | |
| April | 52° / 27° | 11 | 40° | |
| May | 66° / 38° | 6 | 49° | |
| June ● | 76° / 48° | 6 | 58° | |
| July | 79° / 53° | 6 | 68° | |
| August ● | 78° / 52° | 6 | 69° | |
| September ● | 70° / 45° | 8 | 64° | |
| October | 57° / 35° | 9 | 56° | |
| November | 44° / 27° | 15 | 45° | |
| December | 33° / 18° | 15 | 36° |
Mackinac Island facts
- Sits at about 710 ft above sea level.
- 30.0 in of rain in a typical year, with October the wettest month.
- July runs hottest (79° afternoons); February nights are the coldest (7°).