What is the weather like in Indiana Dunes National Park vs Mammoth Cave National Park in December?

In December, Indiana Dunes National Park averages 4°C high / -2°C low with about 56 mm of rain; Mammoth Cave National Park averages 12°C high / 1°C low with about 124 mm.

Indiana Dunes National Park vs Mammoth Cave National Park in December

Mammoth Cave National Park is the better pick in December — 70 vs 63 on SeasonMap's comfort score. Mammoth Cave National Park is cold, rainy, clean air, while Indiana Dunes National Park is freezing, a little rain, clean air.

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

	🇺🇸 Indiana Dunes National Park	🇺🇸 Mammoth Cave National Park
Comfort score	63/100 (C)	70/100 (B)
Feels-like high	-1°C	9°C
Avg high / low	4° / -2°	12° / 1°
Rainfall	56 mm	124 mm
Rainy days	8	9
Humidity	76%	73%
Air quality (AQI)	33	30

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

Month by month

Indiana Dunes National Park 🇺🇸 United Statesfreezing, a little rain, clean air · best May63
Mammoth Cave National Park 🇺🇸 United Statescold, rainy, clean air · best April70

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

Is December better in Indiana Dunes National Park or Mammoth Cave National Park?: Mammoth Cave National Park is the better pick in December — 70 vs 63 on SeasonMap's comfort score. Mammoth Cave National Park is cold, rainy, clean air, while Indiana Dunes National Park is freezing, a little rain, clean air.
What is the weather like in Indiana Dunes National Park vs Mammoth Cave National Park in December?: In December, Indiana Dunes National Park averages 4°C high / -2°C low with about 56 mm of rain; Mammoth Cave National Park averages 12°C high / 1°C low with about 124 mm.