January weather forecast in Stockton

January in Stockton is the rainiest and the cloudiest month of the year. In January, the weather in Stockton is typically warm. Average daily high temperature in January is about 14 degrees above zero. On average, Stockton has 10 rainy, 9 partly cloudy, 7 sunny, and 5 cloudy days in January. The rains are usually heavy. January as well as December is considered the most uncomfortable time to visit Stockton.