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Isle Royale National Park: reservations, fees, camping and weather
Isle Royale National Park, Michigan: what you need to book, what it costs, and when the weather is mildest. Checked November 2026.
Do you need a reservation to enter?
No entry reservation is mentioned on the park's fees page.
Fees and passes
$7 per person per day (April 16–October 31), aged 16 and older. Ferries and seaplanes are paid separately.
Non-US residents can buy the America the Beautiful Non-Resident Annual Pass ($250).
An America the Beautiful pass covers entrance at every national park. US citizens and residents get free entry on national park fee-free days.
Camping: how to book
Camping and permits differ by area; reservable sites and permits are booked on Recreation.gov. Many Recreation.gov campgrounds open on a rolling window months ahead and sell out within minutes; if yours is full, set up a cancellation alert.
Official planning pages
The park's own pages for the things that change: conditions, closures, camping and permits.
Key dates
- Wed 11 Nov 2026 National parks fee-free day: Veterans Day Confirmed
- December 2026 · exact dates not announced 2027 national park fee-free days announced Expected
Weather by month
| Month | Camping weather | Avg high | Avg low | Precip. | Snow | Daylight |
|---|---|---|---|---|---|---|
| January | Poor · 0 | 20°F | 1°F | 1.4 in | 12.2 in | 8 h 43 m |
| February | Poor · 0 | 24°F | 2°F | 1.0 in | 8.0 in | 10 h 05 m |
| March | Poor · 0 | 34°F | 13°F | 1.3 in | 8.0 in | 11 h 42 m |
| April | Poor · 33 | 45°F | 26°F | 2.8 in | 7.7 in | 13 h 32 m |
| May | Great · 85 | 58°F | 37°F | 3.1 in | 0.2 in | 15 h 05 m |
| June | Great · 95 | 68°F | 46°F | 3.6 in | 0.0 in | 15 h 56 m |
| July | Great · 97 | 74°F | 52°F | 3.4 in | 0.0 in | 15 h 35 m |
| August | Great · 100 | 73°F | 52°F | 3.0 in | 0.0 in | 14 h 13 m |
| September | Great · 99 | 65°F | 44°F | 3.1 in | 0.0 in | 12 h 26 m |
| October | Good · 60 | 51°F | 33°F | 3.4 in | 0.5 in | 10 h 40 m |
| November | Poor · 0 | 38°F | 22°F | 2.6 in | 6.7 in | 9 h 06 m |
| December | Poor · 0 | 26°F | 9°F | 1.7 in | 11.9 in | 8 h 19 m |
NOAA 1991–2020 climate normals at the Grand Portage, MN weather station (730 ft). Higher trails are colder; temperatures usually drop about 3–5°F per 1,000 ft. "Camping weather" is our simple score: best with highs of 62–82°F, nights above freezing and under 3 in of precipitation. It rates weather only, not road closures, snow on trails or crowds. Daylight is sunrise to sunset on the 15th. About NOAA normals ↗
Questions
Do I need a reservation to enter Isle Royale National Park?
No entry reservation is mentioned on the park's fees page.
How much does it cost to enter Isle Royale?
$7 per person per day (April 16–October 31), aged 16 and older. Ferries and seaplanes are paid separately. Non-US residents can buy the America the Beautiful Non-Resident Annual Pass ($250).
When is the weather mildest at Isle Royale?
Using NOAA averages at the park's weather station, average highs are between 60°F and 85°F in June to September. July is warmest (about 74°F) and January has the coldest nights (about 1°F).
Sources: Isle Royale fees and passes (nps.gov), NOAA station data. Rules change; always check the official park site before you go.
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