Isle Royale National Park weather in June
June in Isle Royale National Park: cold, a little rain, with clean air — an excellent time to visit.
#3 of 12 months in Isle Royale National Park · #294 of 604 destinations to visit in June · comfort 82/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Isle Royale National Park climate normals — June
| Daytime high | 9°C / 49°F | 🧥 cold |
|---|---|---|
| Nighttime low | 5°C / 42°F | |
| Feels like (high) | 7°C / 45°F | |
| Rainfall | 56 mm / 2.2 in | 🌦 some rain |
| Rainy days | 6 days | |
| Humidity | 89% | 💦 very humid |
| Dew point | 5°C / 41°F | |
| Sunshine | 12.6 h/day | |
| Daylight | 16 h | |
| Wind | 28 km/h / 17 mph | |
| Air quality (US AQI) | 44 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Isle Royale National Park?
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Isle Royale National Park in June — FAQ
- Is June a good time to visit Isle Royale National Park?
- June in Isle Royale National Park: cold, a little rain, with clean air — an excellent time to visit. It ranks #3 of 12 months for Isle Royale National Park on SeasonMap's comfort score (82/100).
- What is the weather like in Isle Royale National Park in June?
- In June, Isle Royale National Park averages a daily high of 9.3°C and a low of 5.4°C, with about 55.6 mm of rain over roughly 6.2 rainy days.
- What is the air quality in Isle Royale National Park in June?
- Isle Royale National Park has a mean US Air Quality Index of about 44 in June.