June in Batam is the sunniest month of the year. In June, the weather in Batam is typically hot. Average daily high temperature in June is about 29 degrees above zero. On average, Batam has 23 rainy, 6 sunny, and 1 cloudy day in June. The rains are usually heavy. June as well as January, February, March, and April is considered the most uncomfortable time to visit Batam.