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United StatesThe weather in January in Seattle
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.
Looking for sun? January isn’t a good month to be in Seattle. There’s too much chance of rain this month.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in January for Seattle, Washington. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Water temperature
The water temperature at Seattle is 8°C this month. This is too cold to swim without protective gear.
Precipitation and snowfall
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.
Daily weather 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.
January weather comparison
| Seattle | New York | |
|---|---|---|
| Average temperature | 10°C | 5°C |
| Max. temperature | 11°C | 11°C |
| Min. temperature | 1°C | -5°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.
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.
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.
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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.
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Temperature charts
These charts show the average temperatures in January in Seattle, Washington. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in January in Seattle
Temperature in January in Seattle over the years
Precipitation charts
These charts show the average amount of precipitation in January in Seattle, Washington. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in January in Seattle
Total precipitation in January in Seattle over the years
Daily Snowfall in January in Seattle
Snowfall in January in Seattle per year
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.
Weather experiences in January in Seattle
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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.