Brazil’s high season runs from December to March. Brazil’s low season runs from May to September. During the summer, which runs from December to February, Rio and the Northeast have temperatures in the high 30s. The rest of the year temperatures are generally in the mid-20s to low 30s. The south has wider temperature variations, ranging from 15°C in the winter (June through August) to 35°C in the summer. The Amazon region rarely gets hotter than 27°C, but it is humid there, with considerable rainfall over tropical Amazonia. In some parts of the North, December to March is considered winter, since that’s the rainiest season. The Amazon and the Pantanal are best from June to August, when it’s drier.