In September, the weather in San José del Guaviare is typically hot. Average daily high temperature in September is about 29 degrees above zero. On average, San José del Guaviare has 23 rainy, 5 partly cloudy, and 2 cloudy days in September. The rains are usually heavy. September as well as March, April, May, and June is considered the most uncomfortable time to visit San José del Guaviare.