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.

Isle Royale by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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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.

Maximum daytime temperature = 72 - 86°F [remove]
Daily hours of sunshine = 10 hours or more [remove]

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Max Day Temperature (°F)

  • 18°F maximum daytime temperature in January in Isle Royale18
    Jan
  • 21°F maximum daytime temperature in February in Isle Royale21
    Feb
  • 32°F maximum daytime temperature in March in Isle Royale32
    Mar
  • 46°F maximum daytime temperature in April in Isle Royale46
    Apr
  • 59°F maximum daytime temperature in May in Isle Royale59
    May
  • 68°F maximum daytime temperature in June in Isle Royale68
    Jun
  • 75°F maximum daytime temperature in July in Isle Royale75
    Jul
  • 72°F maximum daytime temperature in August in Isle Royale72
    Aug
  • 63°F maximum daytime temperature in September in Isle Royale63
    Sep
  • 52°F maximum daytime temperature in October in Isle Royale52
    Oct
  • 36°F maximum daytime temperature in November in Isle Royale36
    Nov
  • 23°F maximum daytime temperature in December in Isle Royale23
    Dec

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)  |  Imperial (°F)

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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 75°F.

Which month has the most rain in Isle Royale?

In terms of rainfall, September is usually the wettest month in Isle Royale with 3.4 inches 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 55°F.

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