Normal weather for Seattle in January
It's cool in January in Seattle with an average temperature of 10°C. Temperatures this month range from a low of 7°C to a high of 11°C. At night, you can expect temperatures between 1°C and 6°C.
In January, there is an average of 103 mm of precipitation, spread over 14 days. Of the total precipitation, about 1,5 cm falls as snow in January. The wind speed is around 3 Bft, mostly coming from the Southeast.
Seattle in January |
New York | ||
|---|---|---|---|
 Average Temperature |
10°C | 5°C | |
 High Temp |
11°C | 11°C | |
| Low Temp |
7°C | 1°C | |
 Total Precipitation |
103 mm | 97 mm | |
| Rainy Days |
14 days | 12 days | |
 Total Snowfall |
1,5 cm | 16 cm | |
| Snowy Days |
1 day | 8 days | |
Start of January
The month of January starts in Seattle with cold temps, averaging around 9°C during the day and nights around 4°C. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry.
With the temperature difference between day and night, it’s smart to wear layers. During the day, wear a thick jacket, sweater, and long pants. For the evening and morning, we recommend a heavy winter coat, sweater, long pants, beanie, and gloves.
Mid January
By mid-January, daytime temps rise to around 11°C, with nights around 5°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
Since it cools down at night, it’s a good idea to wear layers. During the day, go for a warm jacket, sweater or hoodie, and long pants. For the evening and morning, we recommend a thick jacket, sweater, and long pants.
End of January
By the end of January, the average daytime temperature in Seattle is around 10°C, while nighttime temps are about 5°C. A shower might pop up, but overall, the weather will be dry and sunny.
Because temperatures drop in the evening, wearing layers is recommended. During the day, go for a warm jacket, sweater or hoodie, and long pants. For the evening and morning, we recommend a thick jacket, sweater, and long pants.
Find affordable trips to Seattle 
Water temperature
The water temperature at Seattle is 8°C this month. This is too cold to swim without protective gear.
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 Seattle?
Looking for sun? January isn’t a good month to be in Seattle. There’s too much chance of rain this month.
Check out the climate of Seattle for all months and discover the best travel time
December
Plan your next vacation
Don’t miss the best vacation deals for Seattle and see what our partners have for you.
Daily Temperature in January in Seattle
This chart shows the average daily high and low temperatures in January for Seattle, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in January in Seattle
The chart below shows the average daily precipitation in January for Seattle, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed 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 it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for January, you can expect about 14 days of precipitation in Seattle.
Daily Snowfall in January in Seattle
This chart shows the average daily snowfall in January in Seattle, measured in centimeters. 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 Seattle
This chart shows the average daily UV index in January in Seattle, 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 Seattle Over the Years
This chart shows the average temperature in January in Seattle, measured in degrees Celsius, over the past few years.
Total Precipitation in January in Seattle Over the Years
This chart shows the average precipitation in January in Seattle, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Snowfall in January in Seattle per year
This chart shows the average snowfall in January in Seattle, measured in centimeters, over the past few years.
Daily Climate in January for Seattle
Click on any day in January to get detailed info about the usual weather on that day in Seattle. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in January in Seattle
Have you been to Seattle in January?
Share your weather experience in January in Seattle.
Average Weather in Seattle by Month
Click on a month below to see detailed weather info for Seattle. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
