Weather in Mackinac Island: May
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Average day temperature: | 51.3°F |
| Average night temperature: | 45.7°F | |
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Sea water temperature: | 42.8°F |
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Number of sunny days: | 10 days |
| Day length: | 14.4 - 15.5 hours | |
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Number of rainy days: | 2 days |
| Precipitation totals: | 0.8 in. | |
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forecast
| Mackinac Island |
temperature
| Mackinac Island |
Air temperature in May, °F
The highest day temperature during May of 2025 was 58°F. At the same time the lowest night temperature was 35°F. Daily and nightly averages during May were 49.4°F and 44.5°F.
Sea water temperature in Mackinac Island in May, °F
The average sea water temperature in May of 2025 was 43.7°F. The highest and lowest sea temperatures during the month were 50.0°F and 37.8°F.
Number of sunny, partly cloudy and cloudy days in May is almost equal.
Precipitation total in May, in.
Precipitation total value in Mackinac Island in May is 0.8 in. Other months of the year show relatively similar values.
The average wind speed value in May is 9.1 mph It makes May one of the least windy months 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 May is: 8.1.
Best time for vacation in Mackinac Island
Mackinac Island on a weather map
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