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SeaTac weather in January (Washington State, United States of America)

Interested in knowing the climate of SeaTac in January? Here's what you need to know about the weather for the month.

Temperatures

During January, SeaTac usually has low temperatures and high rainfall. During January, the winter season is in full swing. During the daylight hours, temperatures often reach 8°C. After dark they usually decrease to around 2°C.

Precipitation

SeaTac in January usually receives high rainfall, averaging around 141 mm for the month. Expect around 19 days of rain based on historical data.

Average sunshine

The city usually sees around 70 hours of sunlight, indicating fewer sunny days.

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

Need inspiration to choose your next destination? Our innovative weather planner helps you discover the perfect getaway tailored to your ideal climate conditions.

Select a Month of Interest

Check the conditions for any month of the year.

For a detailed overview over the year and the best time to visit the United States of America, check out our SeaTac's climate page.

SeaTac, monthly averages in January

Min TemperatureMin Temperature 2°C  
Max TemperatureMax Temperature 8°C  
Chance of RainChance of Rain 62%  
PrecipitationPrecipitation 141 mm  
Rainy daysRainy days 19 days  
HumidityHumidity 78% *  
WindspeedWindspeed 5 m/s *  
SunshineSunshine 70 hours *  
Percentage SunshinePercentage Sunshine 25% *  

Where to go in the United States of America in January

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

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In January generally
poor weather
with low temperatures
and high monthly rainfall

More information

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).

Select a Month of Interest

Check the conditions for any month of the year.

For a detailed overview over the year and the best time to visit the United States of America, check out our SeaTac's climate page.

So, what should you wear in this month?

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.

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

Interested in more climate information?

This site provides you with all the information you need about the climate in SeaTac.

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 travel conditions. Find out where to go with our weather planner.