Rio Grande da Serra experiences mild winters, with average temperatures ranging from 15-17°C in July and August. Spring is characterized by moderate temperatures, averaging around 18-22°C in September and October. Summer brings warmer days, with temperatures often reaching highs of 33-35°C in December, January, and November, while lows hover around 12-14°C. Autumn sees a slight cooling trend, with average temperatures dropping to around 15-20°C from April to May. The temperature fluctuations throughout the year are moderate, with no extreme variations between seasons.