September in Pemalang is the hottest month of the year. In September, the weather in Pemalang is typically hot. Average daily high temperature in September is about 30 degrees above zero. On average, Pemalang has 18 partly cloudy, 8 sunny, 2 rainy, and 2 cloudy days in September. The rains are usually light. September as well as July and August is considered the most comfortable time to visit Pemalang.