Avg weather in December
9 Hrs per day
86 mm per month
79 % avg
8 Mph avg

Washington Weather in December

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What’s the weather like in Washington in December?

Washington weather in December is very cold with frequent snowfall in the highest parts of the land. During your stay, you can explore the snow-capped Cascade Mountains that span across the Pacific Northwest and offer spectacular views from all angles.

Geographical influences

The climate in Washington is quite wet for most of the year, with heavier showers occurring in the summer. There’s slightly less rain in December, but the low temperatures carry snowstorms to the region, which is perfect for a traditional white Christmas experience. Explore the Fort Vancouver National Historic Site and learn about the history of the land. The site is great for a day trip and often hosts special events and offers interactive educational activities for the kids.


Temperatures reach highs of 10°C, which is very cold weather and you’ll definitely need to pack lots of warm clothes if you’re visiting Washington in December. Humidity levels are high at 79% with cooling winds up of to 8mph. You’ll enjoy ten hours of beautiful sunshine each day with an average rainfall of 86mm spread over the month.

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