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 air58tier D
- Februaryfreezing, a little rain, clean air61tier C
- Marchcold, rainy, clean air71tier B
- Aprilcold, rainy, clean air81tier A
- Maynice, rainy86tier A
- Junewarm, rainy83tier A
- Julyhot, rainy, very humid77tier B
- Augustwarm, rainy, very humid79tier B
- Septemberwarm, rainy, clean air86tier A
- Octobercool, rainy, clean air80tier A
- Novembercold, a little rain, clean air75tier B
- Decembercold, a little rain, clean air67tier C