January weather - Winter 2026 - Seattle, WA
January is the first month it typically snows. Throughout January, in the average 1. 3 snowfall days, it receives 0. 12" (3mm) of snow. In Seattle, during the entire year, snow falls for 4. 8 days and aggregates up to 0. 94" (24mm) of snow. In January, the average ocean temperature is 45. 5°F (7. 5°C).
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