What is the weather like in Glacier National Park vs Rocky Mountain National Park in December?

In December, Glacier National Park averages -3°C high / -9°C low with about 167 mm of rain; Rocky Mountain National Park averages -2°C high / -9°C low with about 75 mm.

Glacier National Park vs Rocky Mountain National Park in December

Rocky Mountain National Park is the better pick in December — 47 vs 35 on SeasonMap's comfort score. Rocky Mountain National Park is freezing, a little rain, clean air, while Glacier National Park is freezing, soaked, clean air.

Glacier National Park vs Rocky Mountain National Park — December climate, side by side

	🇺🇸 Glacier National Park	🇺🇸 Rocky Mountain National Park
Comfort score	35/100 (F)	47/100 (F)
Feels-like high	-8°C	-7°C
Avg high / low	-3° / -9°	-2° / -9°
Rainfall	167 mm	75 mm
Rainy days	19	13
Humidity	87%	68%
Air quality (AQI)	37	44

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

Month by month

Glacier National Park 🇺🇸 United Statesfreezing, soaked, clean air · best July35
Rocky Mountain National Park 🇺🇸 United Statesfreezing, a little rain, clean air · best August47

Glacier National Park vs Rocky Mountain National Park in December — FAQ

Is December better in Glacier National Park or Rocky Mountain National Park?: Rocky Mountain National Park is the better pick in December — 47 vs 35 on SeasonMap's comfort score. Rocky Mountain National Park is freezing, a little rain, clean air, while Glacier National Park is freezing, soaked, clean air.
What is the weather like in Glacier National Park vs Rocky Mountain National Park in December?: In December, Glacier National Park averages -3°C high / -9°C low with about 167 mm of rain; Rocky Mountain National Park averages -2°C high / -9°C low with about 75 mm.