Isle Royale · September · Michigan
Isle Royale National Park in September
September is a prime month to visit Isle Royale National Park. Crowds are moderate. Highs average 63°F and lows 58°F, with about 3.51 inches of rain.
September gets a prime rating at Isle Royale. The very best months are Jul–Sep.
Last prime month Best value
What to expect
September is prime at Isle Royale. September is the best month: fewer bugs, fall color and moose activity. The park closes at the end of October.
Visits average several days, and many visitors stay four or more. The ferry ride itself is part of the adventure.
Good to know
- Best months overall: Jul–Sep.
- Closest airport: Houghton (CMX), then a ferry or seaplane.
- Before you go: Ferries and seaplanes run seasonally and book up early. Check current conditions on nps.gov.
Questions
Is September a good time to visit Isle Royale National Park?
September is a prime month to visit Isle Royale National Park. Crowds are moderate. Highs average 63°F and lows 58°F, with about 3.51 inches of rain.
What is the weather like in Isle Royale National Park in September?
Highs average 63°F and lows 58°F, with about 3.51 inches of rain. September is rated prime for visiting.
How crowded is Isle Royale National Park in September?
Crowds are moderate in September.