Grajau's climate is characterized by a warm and humid season from December to May, with temperatures consistently above 20C. The hottest months are January and February, with average highs reaching as high as 33-34C, while lows range from 22-23C. As the year progresses, temperatures gradually decrease, with September and October experiencing mild temperatures in the mid-20s. From June to November, a distinct dry season takes hold, bringing slightly cooler temperatures and lower humidity levels, with averages ranging from 18-22C. During this period, Grajau experiences a dry and relatively cool climate, providing a welcome respite from the intense heat of the preceding months.