Isle Royale · May · Michigan
Isle Royale National Park in May
May is a fair month for Isle Royale National Park, with some limitations. It is one of the quietest times to go. Highs average 44°F and lows 38°F, with about 2.85 inches of rain.
May is rated fair at Isle Royale. Consider Jul–Sep instead.
What to expect
Honest take: May is not the month for Isle Royale. Opens in mid-April, but ferries start in May. It's cold, and black flies can be intense in June.
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 May a good time to visit Isle Royale National Park?
May is a fair month for Isle Royale National Park, with some limitations. It is one of the quietest times to go. Highs average 44°F and lows 38°F, with about 2.85 inches of rain.
What is the weather like in Isle Royale National Park in May?
Highs average 44°F and lows 38°F, with about 2.85 inches of rain. Conditions are fair this month, so check the month-by-month ratings before you commit.
How crowded is Isle Royale National Park in May?
May is one of the quietest months at Isle Royale National Park.