Isle Royale National Park weather in January
January in Isle Royale National Park: freezing, a little rain, with clean air — one of the weakest months to visit.
#12 of 12 months in Isle Royale National Park · #543 of 604 destinations to visit in January · comfort 37/100 (tier F)
Updated June 2026 · climate normals from ERA5 reanalysis
Isle Royale National Park climate normals — January
| Daytime high | -4°C / 25°F | 🥶 freezing |
|---|---|---|
| Nighttime low | -8°C / 17°F | |
| Feels like (high) | -11°C / 12°F | |
| Rainfall | 41 mm / 1.6 in | 🌦 some rain |
| Rainy days | 11 days | |
| Humidity | 80% | 💦 very humid |
| Dew point | -10°C / 14°F | |
| Sunshine | 4 h/day | |
| Daylight | 8.9 h | |
| Wind | 37 km/h / 23 mph | |
| Snowfall | 46.6 cm / 18.3 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 January — FAQ
- Is January a good time to visit Isle Royale National Park?
- January in Isle Royale National Park: freezing, a little rain, with clean air — one of the weakest months to visit. It ranks #12 of 12 months for Isle Royale National Park on SeasonMap's comfort score (37/100).
- What is the weather like in Isle Royale National Park in January?
- In January, Isle Royale National Park averages a daily high of -4°C and a low of -8.4°C, with about 41.2 mm of rain over roughly 11.4 rainy days.
- What is the air quality in Isle Royale National Park in January?
- Isle Royale National Park has a mean US Air Quality Index of about 33 in January.
- Does it snow in Isle Royale National Park in January?
- Isle Royale National Park sees roughly 46.6 cm of snowfall in January.