Isle Royale National Park in June
In June, Isle Royale National Park averages a high of 68°F and a low of 46°F, with 3.6 inches of precipitation (rain plus melted snow). About 6,100 people visit, the 3rd busiest of 12 (busy). Days are 16 hours 01 minutes long.
- Quiet
- Moderate
- Busy
- Very busy
- Few or no visits (may be closed)
- Best months
- High / low
- 68° / 46°F
- Precipitation
- 3.6in
- Snow
- 0in
- Daylight
- 16h 1m
- Visitors
- 6,100
- Crowds
- Busy
June is one of the best months to visit: mild, wet weather with busy crowds.
Weather 1991–2020 averages at Grand Portage, MN, 41.1 miles from the park's center, 730 ft. Visitors National Park Service recreation visits, average of 2023–2025. Updated .
Other parks in June
| Park | High / low °F | Crowds | Weather |
|---|---|---|---|
| Voyageurs National Park | 73° / 48° | Very busy | Mild, wet |
| Sleeping Bear Dunes National Lakeshore | 71° / 53° | Busy | Mild, wet |
| Indiana Dunes National Park | 78° / 60° | Very busy | Mild, wet |
| Cuyahoga Valley National Park | 78° / 56° | Very busy | Mild, wet |
| Gateway Arch National Park | 86° / 65° | Busy | Hot |
Closures, reservations and alerts: Isle Royale National Park on nps.gov
All twelve months at Isle Royale · National parks to visit in June