Indiana Dunes National Park vs Mammoth Cave National Park in September

Indiana Dunes National Park is the better pick in September — 84 vs 75 on SeasonMap's comfort score. Indiana Dunes National Park is warm, a little rain, clean air, while Mammoth Cave National Park is hot, rainy, clean air.

Indiana Dunes National Park vs Mammoth Cave National Park — September climate, side by side

🇺🇸 Indiana Dunes National Park🇺🇸 Mammoth Cave National Park
Comfort score84/100 (A)75/100 (B)
Feels-like high25°C32°C
Avg high / low24° / 16°30° / 16°
Rainfall73 mm107 mm
Rainy days86
Humidity75%69%
Air quality (AQI)4342

Monthly climate normals (ERA5 reanalysis). Comfort scores are SeasonMap estimates.

Month by month

Indiana Dunes National Park vs Mammoth Cave National Park in September — FAQ

Is September better in Indiana Dunes National Park or Mammoth Cave National Park?
Indiana Dunes National Park is the better pick in September — 84 vs 75 on SeasonMap's comfort score. Indiana Dunes National Park is warm, a little rain, clean air, while Mammoth Cave National Park is hot, rainy, clean air.
What is the weather like in Indiana Dunes National Park vs Mammoth Cave National Park in September?
In September, Indiana Dunes National Park averages 24°C high / 16°C low with about 73 mm of rain; Mammoth Cave National Park averages 30°C high / 16°C low with about 107 mm.