December in San José del Guaviare is the windiest month of the year. In December, the weather in San José del Guaviare is typically hot. Average daily high temperature in December is about 28 degrees above zero. On average, San José del Guaviare has 12 rainy, 8 partly cloudy, 7 cloudy, and 4 sunny days in December. The rains are usually moderate.