Seattle Weather in January
January in Seattle typically sees daytime highs of 8°C (46°F) and nighttime lows of 2°C (36°F). Rainfall is also possible this month, so it's worth packing an umbrella. It falls within the winter season.
Rainfall in Seattle in January
Historically, the month has about 19 days of rain, averaging 141 mm (5.6 in) in total. Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.
Temperature in Seattle in January
In January, expect low temperatures in Seattle, with highs of 8°C (46°F) and lows of 2°C (36°F) at night. The month of January belongs to the winter season. The days stay cool from start to finish. Layering up well will make outdoor time much more comfortable. Nights fall to 2°C (36°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.
Sunshine in Seattle in January
The month has fewer sunny days, with around 70 hours of sunshine.
Wind Speed in Seattle in January
January has wind speeds averaging 5 m/s (10 knots). You can expect gentle to moderate winds that move small trees and make flags wave steadily on typical days. Conditions typically range from light breezes to moderate winds.If you prefer dry days with pleasant temperatures, January may not be the ideal month to visit Seattle. Our weather planner can help you explore destinations with more pleasant weather conditions.
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 Seattle's climate page.
Seattle Temperature in January
Min Temperature
2°C (36°F)
Max Temperature
8°C (46°F)
Chance of Rain
63%
Precipitation
141 mm (5.6 in)
Rainy days
19 days
Humidity
78%
Windspeed
5 m/s (10 knots)
Sunshine
70 hours
Percentage Sunshine
25%
Daily Historical Temperatures
51-year average (1976-2026)
Based on our historical records, temperatures in Seattle typically stay consistent throughout January, with daily highs averaging around 8°C (46°F). Nights are cold, with lows around 3°C (37°F).
Average temperatures in January
Daily Historical Precipitation
51-year average (1976-2026)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in January
Historical weather for Seattle in January
Browse day-by-day weather records for Seattle spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Seattle historical weather extremes in January
The extremes listed below come from historical weather data collected in Seattle from 1976 through 2025.
- The hottest January day on record in Seattle reached 17°C (63°F) (January 15, 2018).
- The coldest January day was on January 13, 2024, with a maximum of -6°C (21°F).
- Seattle registered its coldest January night on January 6, 1982, with temperatures dropping to -10°C (14°F).
Best Places 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. See all of the United States of America in January →
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What to Wear in Seattle in January
Cold weather calls for smart layering in January. A thermal base layer makes a huge difference in staying warm. Add a wool sweater or fleece, then a wind-resistant outer jacket. Prepare for significant rainfall with proper waterproof clothing and shoes. Sunglasses aren't essential this month, though you might want them for the occasional bright moment.What To Do in Seattle in January
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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 Seattle's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Seattle climate overview or explore weather in the United States of America.
