In September, the weather in Kota Bharu is typically hot. Average daily high temperature in September is about 29 degrees above zero. On average, Kota Bharu has 25 rainy, 3 cloudy, 1 sunny, and 1 partly cloudy day in September. The rains are usually heavy. September as well as January, April, May, and June is considered the most uncomfortable time to visit Kota Bharu.