Madagascar lies between an equatorial low pressure zone in the north and an Indian Ocean anticyclone in the south-east. During the austral summer, the monsoon or varatraza blows from North-West on the northern part of the island and the trade winds or tsioka atsimo or tsioka atimo of the South-east.

When we talk about the precipitation of Madagascar, by reporting on the geography of Madagascar, the eastern slope remains the most watered between 2000 to 3500 mm per year, the Highland and the North-West under the monsoon receive about 1500 mm, the South and the South-West dry receive only about 800 mm and the arid South 400 mm. The cyclonic period of Madagascar is irregularly marked between January and March.

The rainy season of Madagascar corresponds to the hot season from November to April and the winter or the cool season from May to October.

The average temperatures of the northern part of Madagascar is 27°C, the central highland is 16.5°C and the southern part of the Big Island is 24°C.