July in San Tome is the rainiest and the coldest month of the year. In July, the weather in San Tome is typically hot. Average daily high temperature in July is about 30 degrees above zero. On average, San Tome has 26 rainy, 3 partly cloudy, and 2 sunny days in July. The rains are usually heavy. July as well as May, June, August, and September is considered the most uncomfortable time to visit San Tome.