The best times to visit Mackinac Island for ideal weather are
June 4th to September 30th
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
Mackinac Island Travel Guide
Other Mackinac Island Travel Info
Weather in Mackinac Island
Average temperatures in Mackinac Island vary drastically. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a very low chance of rain or snow throughout the year. The area is somewhat temperate — in the 54th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Mackinac Island, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally early August where highs are regularly around 75.4°F (24.1°C) with temperatures rarely dropping below 60.8°F (16°C) at night.
Mackinac Island Temperatures (Fahrenheit)
Mackinac Island Temperatures (Celsius)
The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.
Mackinac Island Perceived Temperature (F)
Mackinac Island Perceived Temperature (C)
Average Mackinac Island Temperatures by Month
Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.
|Month||Avg. High (°F)||Avg. Mean (°F)||Avg. Low (°F)|
|Month||Avg. High (°C)||Avg. Mean (°C)||Avg. Low (°C)|
Precipitation (Rain or Snow)
If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Mackinac Island are February, March, and then November. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around late January. For example, on the week of January 22nd there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in early to mid December with an average of 2 days of significant precipitation the week of December 10th.
When can you find snow in Mackinac Island? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.
Chance of Precipitation
The graph below shows the % chance of rainy and snowy days in Mackinac Island.
Snow on the Ground
The graph below shows the average snow on the ground in Mackinac Island (in).
Average Rain and Snow by Month
|Month||Daily Chance of Rain||Average Snow Depth (in)||Total Precipitation (in)|
|Month||Daily Chance of Rain||Average Snow Depth (cm)||Total Precipitation (cm)|
Humidity and Wind
Mackinac Island has some very humid months, with other comfortably humid months. The least humid month is May (59% relative humidity), and the most humid month is December (72.7%).
Wind in Mackinac Island is usually calm. The windiest month is December, followed by November and January. December’s average wind speed of around 7.5 knots (8.6 MPH or 13.9 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early to mid December where average top sustained speeds reach 14.9 knots, which is considered a moderate breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Mackinac Island.
The graph below shows wind speed (max and average) in knots.
Average Wind Speeds
Show Wind Speeds
All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.
|Month||Avg. Wind||Avg. Wind Feel||Sustained High Wind||High Wind Feel|
|Jan||7||Gentle breeze||13.6||Significant breeze|
|Feb||6.7||Light breeze||12.6||Significant breeze|
|Mar||6||Light breeze||11.9||Significant breeze|
|Apr||6.4||Light breeze||12.6||Significant breeze|
|May||5.6||Light breeze||11.6||Significant breeze|
|Jun||4.6||Light breeze||10.1||Gentle breeze|
|Jul||4.5||Light breeze||9.9||Significant breeze|
|Aug||4.5||Light breeze||9.9||Gentle breeze|
|Sep||5||Light breeze||10.6||Significant breeze|
|Oct||6.5||Light breeze||12.5||Significant breeze|
|Nov||7.2||Gentle breeze||13.6||Significant breeze|
|Dec||7.5||Gentle breeze||13.7||Significant breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to Mackinac Island?
Our best data indicates this area is generally safe. As of Oct 07, 2019 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Sep 23, 2019.
The Busiest and Least Crowded Months
The busiest month for tourism in Mackinac Island, MI, US is February, followed by August and March. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Mackinac Island in December. Those willing to visit at these times will likely find it the least expensive month.
Estimated Tourism by Month
Most Popular Months to Visit
Overall Mackinac Island Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel moderately cold. Highs range from 66°F (18.9°C) and 26.4°F (-3.1°C) with far warmer temperatures in the later months. Rain is rare with 1 to 3 days of significant precipitation per month. Spring is the busiest for tourism, which makes it a good time for those looking for things to do.
Summer (June through August)
The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see the least precipitation with about 2 days of precipitation per month. June – August is the second busiest season for tourism in Mackinac Island, so lodging and other accommodations may cost slightly more.
Fall (September through November)
Fall daily highs range from 70.2°F (21.2°C) and 36.5°F (2.5°C), which will feel chilly given the humidity and wind. It rains or snows a normal amount: 2 to 3 days per month. Tourism is fairly slow during these months due to the weather, so hotels may be lower priced.
Winter (December through February)
Weather is far too cold this time of year in Mackinac Island to be enjoyable for warm weather travelers. The average high during this season is between 32.6°F (0.3°C) and 24.2°F (-4.3°C). On average, it rains or snows a smalll amount: 0 to 4 times per month. These times of year are the slowest with tourists.