August in São Tomé is the cloudiest month of the year. In August, the weather in São Tomé is typically warm. Average daily high temperature in August is about 24 degrees above zero. On average, São Tomé has 29 cloudy, 1 rainy, and 1 sunny day in August. The rains are usually light. August as well as June and July is considered the most comfortable time to visit São Tomé.