May in Ambon is the rainiest month of the year. In May, the weather in Ambon is typically warm. Average daily high temperature in May is about 27 degrees above zero. On average, Ambon has 27 rainy, 2 cloudy, and 2 partly cloudy days in May. The rains are usually heavy. May as well as January, February, March, and April is considered the most uncomfortable time to visit Ambon.