January in San Tome is the sunniest month of the year. In January, the weather in San Tome is typically hot. Average daily high temperature in January is about 29 degrees above zero. On average, San Tome has 16 partly cloudy, 10 sunny, 3 rainy, and 2 cloudy days in January. The rains are usually light. January as well as February is considered the most comfortable time to visit San Tome.