January in Semarang is the rainiest, the cloudiest, and the coldest month of the year. In January, the weather in Semarang is typically warm. Average daily high temperature in January is about 27 degrees above zero. On average, Semarang has 30 rainy and 1 partly cloudy day in January. The rains are usually heavy. January as well as February, March, April, and November is considered the most uncomfortable time to visit Semarang.