Mount Rainier National Park Weather in December

December in Mount Rainier National Park sees daytime temperatures around -6°C (21°F) and lows of -13°C (9°F) at night. Being part of the rainy season, heavy snowfall is a regular part of the day, so pack accordingly.

Rainfall in Mount Rainier National Park in December

As part of the rainy season, Mount Rainier National Park sees around 25 days of rain in December, with an average of 532 mm (21 in). Showers during the rainy season tend to be heavy and can come down intensely. An umbrella is often not enough, so a poncho or waterproof jacket is a better choice.

Temperature in Mount Rainier National Park in December

Mount Rainier National Park in December gets highs of -6°C (21°F) during the day and drops to -13°C (9°F) at night. During December, the winter season is in full swing. Expect a distinctly cold feel throughout the day, not just overnight. Nights drop below freezing to -13°C (9°F). An extra blanket is worth packing if you're unsure about the heating where you're staying. Typically, it's the chilliest month of the year. Ensure you're prepared by packing appropriate winter gear.

Sunshine in Mount Rainier National Park in December

With limited sunshine this month, there are about 61 hours of sun. It's ideal for those who prefer a cooler, cloudier climate.

December in Mount Rainier National Park has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.