January in Bitung is the rainiest and the cloudiest month of the year. In January, the weather in Bitung is typically hot. Average daily high temperature in January is about 28 degrees above zero. On average, Bitung has 27 rainy, 2 sunny, and 2 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 Bitung.