June in San Tome is the cloudiest month of the year. In June, the weather in San Tome is typically hot. Average daily high temperature in June is about 30 degrees above zero. On average, San Tome has 23 rainy, 5 partly cloudy, and 2 cloudy days in June. The rains are usually heavy. June as well as May, July, August, and September is considered the most uncomfortable time to visit San Tome.