June in São João de Meriti is the coldest month of the year. In June, the weather in São João de Meriti is typically warm. Average daily high temperature in June is about 24 degrees above zero. On average, São João de Meriti has 15 sunny, 11 partly cloudy, and 4 rainy days in June. The rains are usually light. June as well as July and August is considered the most comfortable time to visit São João de Meriti.