August in Saitama is the hottest month of the year. In August, the weather in Saitama is typically hot. Average daily high temperature in August is about 30 degrees above zero. On average, Saitama has 17 rainy, 8 sunny, 4 partly cloudy, and 2 cloudy days in August. The rains are usually heavy. August as well as February, March, June, and July is considered the most uncomfortable time to visit Saitama.