Isle Royale National Park weather in October
October in Isle Royale National Park: cold, a little rain, with clean air — a great time to visit.
#6 of 12 months in Isle Royale National Park · #405 of 604 destinations to visit in October · comfort 70/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Isle Royale National Park climate normals — October
| Daytime high | 10°C / 49°F | 🧥 cold |
|---|---|---|
| Nighttime low | 7°C / 45°F | |
| Feels like (high) | 6°C / 43°F | |
| Rainfall | 73 mm / 2.9 in | 🌦 some rain |
| Rainy days | 11 days | |
| Humidity | 76% | 💦 very humid |
| Dew point | 4°C / 40°F | |
| Sunshine | 6.9 h/day | |
| Daylight | 10.8 h | |
| Wind | 34 km/h / 21 mph | |
| Snowfall | 1 cm / 0.4 in | |
| Air quality (US AQI) | 33 | 🍃 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 October — FAQ
- Is October a good time to visit Isle Royale National Park?
- October in Isle Royale National Park: cold, a little rain, with clean air — a great time to visit. It ranks #6 of 12 months for Isle Royale National Park on SeasonMap's comfort score (70/100).
- What is the weather like in Isle Royale National Park in October?
- In October, Isle Royale National Park averages a daily high of 9.7°C and a low of 7.1°C, with about 73.2 mm of rain over roughly 10.6 rainy days.
- What is the air quality in Isle Royale National Park in October?
- Isle Royale National Park has a mean US Air Quality Index of about 33 in October.
- Does it snow in Isle Royale National Park in October?
- Isle Royale National Park sees roughly 1 cm of snowfall in October.