Isle Royale National Park weather by month
The best time to visit Isle Royale National Park, United States is July. Pick a month for full climate normals and a verdict.
- Januaryfreezing, a little rain, clean air37tier F
- Februaryfreezing, a little rain, clean air40tier F
- Marchfreezing, a little rain, clean air55tier D
- Aprilfreezing, rainy, clean air64tier C
- Maycold, a little rain, clean air76tier B
- Junecold, a little rain, clean air82tier A
- Julycool, a little rain, clean air89tier A
- Augustnice, a little rain, clean air85tier A
- Septembercool, rainy, clean air80tier A
- Octobercold, a little rain, clean air70tier B
- Novemberfreezing, a little rain, clean air60tier C
- Decemberfreezing, a little rain, clean air45tier F