Weather In California January 2026. Explore comprehensive january 2026 weather forecasts for winters, including daily high and low temperatures, precipitation risks, and monthly temperature trends. Expect 20°c daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in california in january.

The weather in california in january can be quite varied, with temperatures that range from cold to pleasant and precipitation levels ranging from low to heavy. This page is a list of the average statewide temperature in the u.s.