Seattle weather in December (Washington State, United States of America)

Curious about the December weather in Seattle? Wondering if it's an optimal time for a visit? This page provides detailed information on the weather conditions for that month.

In December, Seattle typically experiences low temperatures and high rainfall. December falls within the winter season. Throughout the day, temperatures typically settle at around 8°C. But by evening, they drop to around 2°C. Typically, it's the chilliest month of the year. Ensure you're prepared by packing appropriate winter gear.

Seattle in December usually receives high rainfall, averaging around 143 mm for the month. Based on our climate data of the past 30 years, about 20 days of rain are anticipated.

The area experiences limited sunny days, amounting to roughly 54 hours of sunshine. This makes it perfect for those who lean towards cooler, cloudier settings rather than intense sunlit days

If you're looking for dry conditions and comfortable temperatures, December may not be the ideal month to visit Seattle. June, July, August and September typically offer the best circumstances. While January, February, March, November and December tend to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Seattle climate page with graphs.

 

Seattle, monthly averages in December

Min TemperatureMin Temperature 2°C  
Max TemperatureMax Temperature 8°C  
Chance of RainChance of Rain 66%  
PrecipitationPrecipitation 143 mm  
Rainy daysRainy days 20 days  
HumidityHumidity 80%  
WindspeedWindspeed 14 km/h  
SunshineSunshine 54 hours  
Percentage SunshinePercentage Sunshine 20%  

Where to go in the United States of America in December

Find out more about the weather in the United States of America in December and which places have the best weather conditions in this month.

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Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in Seattle in December?

Wear a base layer in cold weather; this is the #1 thing you can do to increase your overall body temperature.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do in December.

Swimming
4/10
Cycling
4/10
Walking
4/10
Camping
3/10
Outdoor sports
4/10

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in Seattle.

Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find historical weather averages for many cities in the United States of America. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.