Temperatures in January
It's cool in January in Mercer Island with an average temperature of 10°C. Temperatures this month range from a low of 7°C to a high of 12°C. At night, you can expect temperatures between 1°C and 6°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Mercer Island in January. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of January
The month of January starts in Mercer Island with cold temperatures, averaging around 9°C during the day and nights close to 4°C. Plenty of days with a chance of precipitation.
Mid-January
By mid-January, the average daytime temperature rises to around 11°C, with nights close to 5°C. During this part of the month, you can expect regular precipitation, but there’ll also be some sunny days.
End of January
By the end of January, the average daytime temperature in Mercer Island will be around 10°C, with nights close to 5°C. There’s regular precipitation, but with a bit of luck, you’ll also get some dry and sunny days.
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Precipitation in January
In January, there is an average of 196 mm of precipitation, spread over 13 days. Of the total precipitation, about 1,3 cm falls as snow in January. The wind speed is around 3 Bft, mostly coming from the South.
The average precipitation chance is 43% per day this month. The weather’s variable. Some days have higher and others lower precipitation chances, which lowers the average.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in January for Mercer Island. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Mercer Island in January |
London | ||
|---|---|---|---|
 Average Temperature |
10°C | 8°C | |
 High Temp |
12°C | 9°C | |
| Low Temp |
7°C | 6°C | |
 Total Precipitation |
196 mm | 58 mm | |
| Rainy Days |
13 days | 9 days | |
 Total Snowfall |
1,3 cm | 0,8 cm | |
| Snowy Days |
1 day | 1 day | |
December
UV index
The UV index is a maximum of 2 this month. That's a low value on the intensity scale of 1 to 11. The risk of sunburn is minimal at this time.
Is January a good time to visit Mercer Island?
After some sun? Then January isn’t the best time to be in Mercer Island. There’s too much chance of rain this month.
Check out the climate of Mercer Island for all months and discover the best travel time
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Daily Temperature in January in Mercer Island
This chart shows the average daily temperatures, both day and night, for each day in January in Mercer Island, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in January in Mercer Island
The chart below shows the average daily precipitation in January for Mercer Island, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for January, you can expect around 13 days of rain in Mercer Island.
Daily Snowfall in January in Mercer Island
This chart shows the average daily snowfall in January in Mercer Island, measured in centimetres. The bottom of the chart shows the days of the month. The data is based on historical measurements and gives an idea of the average snowfall in January.
Daily UV Index in January in Mercer Island
This chart shows the average daily UV index in January in Mercer Island, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in January in Mercer Island Over the Years
This chart shows the average temperature in January in Mercer Island, measured in degrees Celsius, over the past years.
Total Precipitation in January in Mercer Island Over the Years
This chart shows the average precipitation in January in Mercer Island, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Snowfall in January in Mercer Island per year
This chart shows the average snowfall in January in Mercer Island, measured in centimetres, over the past years.
Daily climate in January for Mercer Island
Click on a specific day in January for detailed info on the typical weather on that day in Mercer Island. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in January in Mercer Island
Have you been to Mercer Island in January?
Share your weather experience in January in Mercer Island.
Average Weather in Mercer Island by Month
Click on a month below to see detailed weather info for Mercer Island. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Mercer Island for all months at once
