Isle Royale · MI · National Park · Trailwind

The best time to visit Isle Royale is generally July and August. It is a national park in Michigan.Best time to visit Isle RoyaleJuly and August tend to bring the best balance of weather, access and conditions. Around then, daytime highs average about 69°F and overnight lows near 60°F.Weather in Isle RoyaleIsle Royale National Park is a remote island wilderness in the middle of Lake Superior. Weather influences traveling to and from the island, as well as your trip once you arrive. For the most up-to-date weather information, call (906) 482-0984 or email isro_parkinfo@nps.gov prior to your trip.Isle Royale weather by month

January: average high 24°F, average low 16°F

February: average high 23°F, average low 13°F

March: average high 32°F, average low 23°F

April: average high 39°F, average low 30°F

May: average high 53°F, average low 39°F

June: average high 63°F, average low 48°F

July: average high 69°F, average low 56°F

August: average high 69°F, average low 60°F

September: average high 63°F, average low 55°F

October: average high 51°F, average low 44°F

November: average high 40°F, average low 33°F

December: average high 31°F, average low 22°F

Know before you go

Entrance fee: about $7 per vehicle.

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