What is the weather like in Mount Rainier National Park vs Olympic National Park in December?

In December, Mount Rainier National Park averages -6°C high / -12°C low with about 281 mm of rain; Olympic National Park averages 2°C high / -3°C low with about 502 mm.

Mount Rainier National Park vs Olympic National Park in December

Olympic National Park is the better pick in December — 35 vs 27 on SeasonMap's comfort score. Olympic National Park is freezing, soaked, clean air, while Mount Rainier National Park is freezing, soaked, clean air.

Mount Rainier National Park vs Olympic National Park — December climate, side by side

	🇺🇸 Mount Rainier National Park	🇺🇸 Olympic National Park
Comfort score	27/100 (F)	35/100 (F)
Feels-like high	-10°C	-1°C
Avg high / low	-6° / -12°	2° / -3°
Rainfall	281 mm	502 mm
Rainy days	20	21
Humidity	85%	90%
Air quality (AQI)	36	35

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

Month by month

Mount Rainier National Park 🇺🇸 United Statesfreezing, soaked, clean air · best August27
Olympic National Park 🇺🇸 United Statesfreezing, soaked, clean air · best August35

Mount Rainier National Park vs Olympic National Park in December — FAQ

Is December better in Mount Rainier National Park or Olympic National Park?: Olympic National Park is the better pick in December — 35 vs 27 on SeasonMap's comfort score. Olympic National Park is freezing, soaked, clean air, while Mount Rainier National Park is freezing, soaked, clean air.
What is the weather like in Mount Rainier National Park vs Olympic National Park in December?: In December, Mount Rainier National Park averages -6°C high / -12°C low with about 281 mm of rain; Olympic National Park averages 2°C high / -3°C low with about 502 mm.