Mercer Island weather in December (Washington State, United States of America)
How is the weather in Mercer Island in December? Here's what the weather might have in store during this month.
In December, Mercer Island typically experiences low temperatures and high rainfall. December falls within the winter season. Daytime temperatures hover around 8°C, while nights can cool down to about 2°C. On average, it is the coldest month of the year. So be prepared and make sure to pack winter cloths.
Mercer Island in December usually receives high rainfall, averaging around 154 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 Mercer Island. June, July, August and September generally stand out with 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 Mercer Island climate page with graphs.
Mercer Island, monthly averages in December
Min Temperature
2°C
Max Temperature
8°C
Chance of Rain
67%
Precipitation
154 mm
Rainy days
20 days
Humidity
80% *
Windspeed
14 km/h *
Sunshine
54 hours *
Percentage 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.
perfect weather
pleasant
tolerable
unpleasant
poor
So, what should you wear in Mercer Island 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.
Interested in more climate information?
Weather and Climate provides you with all the information you need about the climate in Mercer Island.
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.
