Best time to visit Isle Royale

Find the best time to visit Isle Royale and plan your perfect trip in 2024/2025. Get holiday inspiration, weather guides, travel advice and find great deals.

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When is the best time to visit Isle Royale?

The best time to visit Isle Royale is July based on the following average weather conditions.

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Hours of Sunshine (daily)

Best time to visit

The weather guide for Michigan (Isle Royale) shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by meteoblue. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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Which is the hottest month in Isle Royale?

The hottest time of year in Isle Royale is normally July. Expect maximum daytime temperatures to reach 24°C.

Which month has the most rain in Isle Royale?

In terms of rainfall, September is usually the wettest month in Isle Royale with 86mm on average. There are normally 13 days in September with some rain.

When is it sunniest in Isle Royale?

The sunniest time of year in Isle Royale is normally July with bright sunshine on average for 62% of daylight hours; that's 10 hours of sunshine per day.

When is the sea warmest in Isle Royale?

The sea is usually at its warmest in Isle Royale in August when the water temperature reaches 13°C.

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