San Francisco Forecast Next Week 2025 Season. Explore comprehensive december 2025 weather forecasts for san francisco, including daily high and low temperatures, precipitation risks, and monthly temperature trends. The 49ers have plenty to fix entering the upcoming offseason.

See the long range weather forecast for san francisco, check the 30 days forecast view, select a month and get the average expected weather for san francisco. Mostly cloudy, then gradually becoming sunny, with a temperature falling to around 55 by.