Mackinac Island (MI) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Mackinac Island.
Climate overview of Mackinac Island
Mackinac Island, Michigan, United States of America, experiences significant temperature variation throughout the year. Summers bring daytime highs of 24°C (75°F) in July, while winters cool to -4°C (25°F) in February.
Annual rain/snowfall is moderate at around 875 mm (34 in), with October being the wettest month. The city also has warm summers and very cold winters.
Mackinac Island Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Mackinac Island - and find the best time to visit.
Monthly Temperature in Mackinac Island
Depending on the time of the year, temperatures range from comfortable to very cold in Mackinac Island. Average daytime temperatures reach a comfortable 24°C (75°F) in July. In February, the coolest month of the year, temperatures drop to a very cold -4°C (25°F).
At night, temperatures range from around 15°C (59°F) in July to -12°C (10°F) in February.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Mackinac Island
Generally, Mackinac Island has a moderate amount of precipitation, averaging 875 mm (34 in) of rain/snowfall annually. Mackinac Island can be quite wet during October, receiving approximately 121 mm (4.8 in) of precipitation over 17 rainy days.
In contrast, during the driest month (February), you will experience much drier conditions, with 29 mm (1.1 in) of precipitation spread across 12 snowy days. For more details, please visit our Mackinac Island Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Mackinac Island
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: June, July and August
- Warmest weather: July and August
- Fewest rainy days: March, June and July
- Seasonal pattern: Warm summers and very cold winters
- Coldest conditions: February, with freezing nights around -12°C (10°F).
Frequently asked questions about the climate in Mackinac Island
What is the best time to visit Mackinac Island?
June, July and August typically offer the most optimal weather in Mackinac Island. In contrast, January, February, March, April, October, November and December tend to have less optimal conditions. Mackinac Island has warm summers and very cold winters.
What temperatures can I expect in Mackinac Island?
Daytime highs range from -4°C (25°F) in February to 24°C (75°F) in July. Nighttime lows range from -12°C (10°F) to 15°C (59°F). Temperatures vary considerably through the year.
How much rain does Mackinac Island get?
Annual rainfall is around 875 mm (34 in). October is the wettest month with 121 mm (4.8 in), while February is the driest with 29 mm (1.1 in).
Mackinac Island 3-Day Forecast
Mackinac Island (MI) 3-Day Forecast
Mackinac Island on the map
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