January weather forecast in Cupertino

January in Cupertino is the rainiest and the cloudiest month of the year. In January, the weather in Cupertino is typically warm. Average daily high temperature in January is about 14 degrees above zero. On average, Cupertino has 10 rainy, 9 partly cloudy, 6 sunny, and 6 cloudy days in January. The rains are usually heavy. January as well as February, March, and December is considered the most uncomfortable time to visit Cupertino.