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 28°C with moderate heat and humidity.

Which month has the most rain in Isle Royale?

In terms of rainfall, June is usually the wettest month in Isle Royale with 89mm on average. There are normally 11 days in June 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 65% 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 23°C.

Best time to visit Isle Royale

Q: When is the best time to visit Isle Royale?

The best times to visit Isle Royale, Michigan are in July and August Maximum daytime temperature = 22 - 30°C. Daily hours of sunshine = 8 hours or more.

The best times to visit Isle Royale, Michigan are in July and August based on our default weather conditions. Update your weather preferences to see which months best match.

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 times to visit Isle Royale, Michigan are in July and August based on the following average weather conditions.

Maximum daytime temperature = 22 - 30°C [remove]
Daily hours of sunshine = 8 hours or more [remove]

Change the criteria to reflect your weather preferences.

1.5
Jan
1.5
Feb
1.5
Mar
2.5
Apr
2.5
May
4
Jun
5
Jul
5
Aug
2.5
Sep
1.5
Oct
1
Nov
1
Dec

Change criteria

Max Day Temperature (°C)

-8
Jan
-6
Feb
0
Mar
8
Apr
15
May
20
Jun
24
Jul
22
Aug
17
Sep
11
Oct
2
Nov
-5
Dec

Hours of Sunshine (daily)

4
Jan
5
Feb
5
Mar
7
Apr
8
May
9
Jun
10
Jul
8
Aug
6
Sep
4
Oct
3
Nov
3
Dec

Best time to visit

Destination

Daytime temperature

Sunshine hours

Sea temperature

Monthly rainfall

Days with some rain

Heat & humidity

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)