December in Serang is the windiest month of the year. In December, the weather in Serang is typically hot. Average daily high temperature in December is about 29 degrees above zero. On average, Serang has 28 rainy, 2 cloudy, and 1 partly cloudy day in December. The rains are usually heavy. December as well as January, February, March, and April is considered the most uncomfortable time to visit Serang.