Average temperatures, rainfall and packing tips for Seattle, United States in January
January in Seattle is typically cool, with average daytime highs around 8°C and nights near 2°C. It is usually the coldest month of the year in Seattle.
January is typically the wettest month of the year in Seattle, with around 222 mm of rain - plan around showers.
If your dates are flexible, the most comfortable months in Seattle are usually June, July, August and September.
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In January, Seattle averages a daytime high of about 8°C and a night-time low of around 2°C, based on recent historical data. That makes it the coldest month of the year there.
January is typically the wettest month of the year in Seattle, with around 222 mm of rain - plan around showers.
January is a workable time to visit Seattle, with cool days - just pack accordingly. If your dates are flexible, the most comfortable months in Seattle are usually June, July, August and September.