August in Bontang is the windiest month of the year. In August, the weather in Bontang is typically hot. Average daily high temperature in August is about 31 degrees above zero. On average, Bontang has 24 rainy, 4 partly cloudy, and 3 cloudy days in August. The rains are usually heavy. August as well as January, February, March, and April is considered the most uncomfortable time to visit Bontang.