January in San José del Guaviare is the sunniest month of the year. In January, the weather in San José del Guaviare is typically hot. Average daily high temperature in January is about 30 degrees above zero. On average, San José del Guaviare has 11 cloudy, 8 partly cloudy, 7 rainy, and 5 sunny days in January. The rains are usually moderate.