January in Santa Cruz is the cloudiest and the coldest month of the year. In January, the weather in Santa Cruz is typically warm. Average daily high temperature in January is about 12 degrees above zero. On average, Santa Cruz has 10 rainy, 10 sunny, 8 partly cloudy, and 3 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 Santa Cruz.