Weather and Climate
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Since it is surrounded by Lake Superior, Isle Royale experiences cool weather throughout the summer while thunderstorms and rain are very common. Temperatures rarely exceed 80 F. Average temperatures in the summer get as high as 75, and spring and fall temperatures range from 25-45. Winters average from 10-25 and can sometimes drop to -20.
Due to harsh winter conditions, Isle Royale is only open from mid April to early November. The best time to visit is late July because the temperatures are comfortable and the mosquitoes have died off. When traveling to Isle Royale you should always be prepared for cold and rainy weather, especially on the boat.
The biome of Isle Royale is mostly mixed forest and temperate broadleaf.
Due to harsh winter conditions, Isle Royale is only open from mid April to early November. The best time to visit is late July because the temperatures are comfortable and the mosquitoes have died off. When traveling to Isle Royale you should always be prepared for cold and rainy weather, especially on the boat.
The biome of Isle Royale is mostly mixed forest and temperate broadleaf.