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Best Time for Northern Michigan & Mackinac Island circuit
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Sweet spot: May, June, July. Computed from NASA POWER climate normals across the route's overnight towns, balancing temperature, rainfall and daylight.
💡 Good to know
- This warm-season circuit requires the current vehicle opening of Pierce Stocking Scenic Drive plus confirmed round-trip passenger ferry and island attraction access. Recheck exact dates because road, ferry and Fort Mackinac seasons do not begin and end on month boundaries.
- This baseline is not offered November–April because its defining scenic drive, passenger-ferry day and staffed island sites have reduced or closed seasonal operations. Choose May–October and confirm exact opening dates.
| Month | Low | High | Rain | Daylight | |
|---|---|---|---|---|---|
| January | −7.2°C | −2.8°C | 49 mm | 8.9 h | ❄ |
| February | −8.0°C | −3.1°C | 41 mm | 10.1 h | ❄ |
| March | −4.7°C | 1.0°C | 50 mm | 11.6 h | ❄ |
| April | 0.2°C | 6.5°C | 78 mm | 13.3 h | ❄ |
| May | 5.1°C | 11.8°C | 82 mm | 14.7 h | |
| June | 10.7°C | 17.1°C | 83 mm | 15.5 h | |
| July | 15.7°C | 21.5°C | 72 mm | 15.1 h | |
| August | 16.6°C | 22.0°C | 78 mm | 13.9 h | |
| September | 13.3°C | 18.8°C | 91 mm | 12.3 h | |
| October | 7.2°C | 11.8°C | 112 mm | 10.7 h | |
| November | 1.7°C | 5.8°C | 72 mm | 9.2 h | ❄ |
| December | −3.6°C | 0.3°C | 66 mm | 8.5 h | ❄ |