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

In December, Mount Rainier National Park averages -6°C high / -12°C low with about 281 mm of rain; Portland averages 8°C high / 4°C low with about 184 mm.

Mount Rainier National Park vs Portland in December

Portland is the better pick in December — 45 vs 27 on SeasonMap's comfort score. Portland is cold, soaked, clean air, while Mount Rainier National Park is freezing, soaked, clean air.

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

	🇺🇸 Mount Rainier National Park	🇺🇸 Portland
Comfort score	27/100 (F)	45/100 (F)
Feels-like high	-10°C	6°C
Avg high / low	-6° / -12°	8° / 4°
Rainfall	281 mm	184 mm
Rainy days	20	18
Humidity	85%	88%
Air quality (AQI)	36	34

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

Month by month

Mount Rainier National Park vs Portland in December — FAQ

Is December better in Mount Rainier National Park or Portland?: Portland is the better pick in December — 45 vs 27 on SeasonMap's comfort score. Portland is cold, soaked, clean air, while Mount Rainier National Park is freezing, soaked, clean air.
What is the weather like in Mount Rainier National Park vs Portland in December?: In December, Mount Rainier National Park averages -6°C high / -12°C low with about 281 mm of rain; Portland averages 8°C high / 4°C low with about 184 mm.