Weather in Seattle in January 2025
Average weather
Average temperature in Seattle in January
Going from a maximum of +13°C during the day to a minimum of -5°C during the night, the temperature in January averages around +8°C.
The average maximum temperature goes up 44% by the end of the month, compared with the beginning of the month, from +1°C to +9°C.
Is Seattle warm or cold in January?
Seattle is typically cool in January.
Maximum temperatures go up compared to the previous month from +7°C to +8°C. The minimum temperature also goes up from +4°C to +4°C.
Pack a sweater and a jacket as there will be cooler temperatures.
January is one of the coolest months in Seattle, here is the comparison with other months:
Climate in Seattle in January
| December | January | February | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +7°C | +8°C | +9°C | ||||
| Min. temperature | ||||||
| -13°C | -10°C | -12°C | ||||
| Max. temperature | ||||||
| +15°C | +15°C | +17°C | ||||
| Rainfall | ||||||
| 163 mm | 172 mm | 118 mm | ||||
| Wind | ||||||
| 1 m/s | 1 m/s | 1 m/s | ||||
| Humidity | ||||||
| 86% | 85% | 82% | ||||
| Air pressure | ||||||
| 1016 HPa | 1016 HPa | 1016 HPa | ||||
| Sunny days | ||||||
| 2 | 2 | 2 | ||||
| Cloudy days | ||||||
| 14 | 15 | 15 | ||||
| Rainy days | ||||||
| 14 | 13 | 11 | ||||
| Snowy days | ||||||
| 1 | 1 | 0 | ||||
January weather is still as bad as in December. It’s getting warmer as January arrives. The average maximum temperature goes up from +7°C to +8°C during the day. Prepare for more rain. Average rainfall goes from 163 mm to 172 mm. It feels drier, as humidity decreases from 86% to 85%. The average wind speed doesn’t change much during January, staying around 1 m/s. The amount of sunny days stay about the same, averaging 2 sunny days during the month.
But maybe it is worth considering traveling in February as the weather gets better.
Wind
The average wind speed is 2 m/s getting up to 4 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Seattle is gradually increasing during January, going from 2 m/s to 4 m/s over the course of the month.
Rain
Snow
January is one of the snowiest months in Seattle.
Here’s how January is compared with other months in the amount of snow, total mm:
How was the weather last January in Seattle?
Climate Change over Years
The climate in Seattle in January has not changed much over the last 43 years.
The average temperature was the lowest in 1979 (+5°C) and the highest in 2010 (+11°C). The driest year was 1985 with only 12 mm of rainfall, and the wettest year was 2021 with 1212 mm.
FAQ
Is January a good time to visit Seattle?
Can you sunbathe in Seattle in January?
Is Seattle rainy in January?
Is it sunny in Seattle in January?
Other cities in USA
Monthly weather in Seattle
Source of the data
For this page, we’ve looked at the typical weather in Seattle, based on historical hourly weather data from January 1, 1979, to December 31, 2022.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.