Indiana Dunes National Park weather by month
The best time to visit Indiana Dunes National Park, United States is May. Pick a month for full climate normals and a verdict.
- Januaryfreezing, a little rain, clean air57tier D
- Februaryfreezing, a little rain, clean air59tier D
- Marchcold, rainy, clean air70tier B
- Aprilcold, rainy, clean air81tier A
- Maynice, rainy85tier A
- Junewarm, rainy82tier A
- Julyhot, rainy, very humid73tier B
- Augustwarm, rainy, very humid74tier B
- Septemberwarm, rainy, clean air84tier A
- Octobercool, rainy, clean air79tier B
- Novembercold, a little rain, clean air75tier B
- Decembercold, a little rain, clean air66tier C