December in Ambon is the rainiest and the hottest month of the year. In December, the weather in Ambon is typically hot. Average daily high temperature in December is about 29 degrees above zero. On average, Ambon has 28 rainy, 2 cloudy, and 1 sunny 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 Ambon.