Seattle Weather Forecast December 2025. Explore comprehensive december 2025 weather forecasts for 98103 (seattle), including daily high and low temperatures, precipitation risks, and monthly temperature trends. 30dayweather long range weather forecasts predict ideal conditions for a storm.

Explore comprehensive december 2025 weather forecasts for 98103 (seattle), including daily high and low temperatures, precipitation risks, and monthly temperature trends. Precipitation and snowfall will be above average in the north and.