June in Piracicaba is the coldest month of the year. In June, the weather in Piracicaba is typically warm. Average daily high temperature in June is about 22 degrees above zero. On average, Piracicaba has 13 sunny, 13 partly cloudy, 3 rainy, and 1 cloudy day in June. The rains are usually light. June as well as July and August is considered the most comfortable time to visit Piracicaba.