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Mackinaw City Weather in September
September in Mackinaw City brings pleasant temperatures, with daytime highs of 20°C (68°F) and nights around 10°C (50°F). Quite a bit of rainfall is expected, around 106 mm (4.2 in), so pack an umbrella.
Rainfall in Mackinaw City in September
Typically around 13 days of rainfall are expected, averaging 106 mm (4.2 in) for the month. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.
Temperature in Mackinaw City in September
Temperatures in Mackinaw City in September top out at 20°C (68°F) and drop to 10°C (50°F) overnight. This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. With lows of 10°C (50°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.If you prefer dry days with pleasant temperatures, June, July and August typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Mackinaw City Temperature in September
Min Temperature
10°C (50°F)
Max Temperature
20°C (68°F)
Chance of Rain
43%
Precipitation
106 mm (4.2 in)
Rainy days
13 days
Mackinaw City Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Mackinaw City - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Mackinaw City typically drop from around 23°C (73°F) at the start of September to approximately 17°C (63°F) by the end. Nights are cool, with lows typically ranging from 7°C (45°F) to 12°C (54°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather records for Mackinaw City in September
Browse day-by-day weather records for Mackinaw City spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Mackinaw City historical weather extremes in September
According to our 50 years of weather records for Mackinaw City, the following extremes were recorded between 1976 and 2026.
- The warmest day in September was on September 4, 1999, with a maximum of 33°C (91°F).
- On September 22, 1995, Mackinaw City saw its coldest September day with temperatures maxing out at 7°C (45°F).
- The coldest night in September in Mackinaw City was on September 28, 2000, with a minimum of -6°C (21°F).
- The wettest September day on record brought 67 mm (2.6 in) of precipitation to Mackinaw City (September 12, 1996).
Best Places in the United States of America in September
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Mackinaw City in September
Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes.
What To Do in Mackinaw City in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling9/10 -
Walking9/10 -
Camping6/10 -
Outdoor sports9/10
Mackinaw City 3-Day Forecast
More climate data for Mackinaw City
See the full Mackinaw City climate overview or explore weather in the United States of America.
Popular in September
Where to go in September - average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
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