January in Santa Cruz is the windiest 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 25 degrees above zero. On average, Santa Cruz has 26 rainy, 3 cloudy, and 2 sunny days in January. The rains are usually heavy. January as well as April, May, June, and July is considered the most uncomfortable time to visit Santa Cruz.