Weather in Mackinac Island: July
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Average day temperature: | 69.3°F |
| Average night temperature: | 63.0°F | |
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Sea water temperature: | 65.1°F |
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Number of sunny days: | 14 days |
| Day length: | 14.8 - 15.7 hours | |
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Number of rainy days: | 2 days |
| Precipitation totals: | 1.1 in. | |
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forecast
| Mackinac Island |
temperature
| Mackinac Island |
Air temperature in July, °F
The highest day temperature during July of 2025 was 72°F. At the same time the lowest night temperature was 57°F. Daily and nightly averages during July were 67.9°F and 62.9°F.
Sea water temperature in Mackinac Island in July, °F
The average sea water temperature in July of 2025 was 65.8°F. The highest and lowest sea temperatures during the month were 70.7°F and 59.0°F.
Mostly all days in July are sunny but cloudy days are also possible.
Precipitation total in July, in.
Precipitation total value in Mackinac Island in July is 1.1 in. Other months of the year show relatively similar values.
The average wind speed value in July is 7.9 mph It makes July lest windy month of the year.
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in July is: 9.4.
Best time for vacation in Mackinac Island
Mackinac Island on a weather map
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