January in San Pedro de Atacama is the cloudiest month of the year. In January, the weather in San Pedro de Atacama is typically warm. Average daily high temperature in January is about 20 degrees above zero. On average, San Pedro de Atacama has 12 sunny, 9 rainy, 8 partly cloudy, and 2 cloudy days in January. The rains are usually moderate. January as well as February is considered the most uncomfortable time to visit San Pedro de Atacama.