January in General Santos is the cloudiest and the coldest month of the year. In January, the weather in General Santos is typically hot. Average daily high temperature in January is about 29 degrees above zero. On average, General Santos has 22 rainy, 7 cloudy, and 2 partly cloudy days in January. The rains are usually heavy. January as well as February, March, April, and May is considered the most uncomfortable time to visit General Santos.