September in Tarawa is the hottest month of the year. In September, the weather in Tarawa is typically hot. Average daily high temperature in September is about 28 degrees above zero. On average, Tarawa has 17 rainy, 9 sunny, 3 partly cloudy, and 1 cloudy day in September. The rains are usually heavy. September as well as January, March, April, and May is considered the most uncomfortable time to visit Tarawa.