Climate Chart Isalo National Park – 392-1,199m / 1,286-3,934ft
Isalo National Park has a dry, tropical climate. There is little rain, but it mostly falls in the Wet season months from November to March. Temperatures are quite uniform throughout the year and average around 29°C/84°F. The hottest months are during the Wet season and at this time the humidity is also high.
Dry Season April to October – Winter
It hardly ever rains during the Dry season. Daytime temperatures average 27°C/81°F and humidity is similarly low. Nights cool down considerably to an average of 12°C/54°F.
- April & May – Some rains may linger into early April, but this is the beginning of the Dry season. It remains hot with daytime temperatures around 29°C/84°F. At night it drops to an average of 15°C/59°F.
- June, July, August & September – It cools down a little to daytime temperatures of 25°C/77°F in July and nights are quite chilly at 11°C/52°F.
- October – Temperatures increase slightly to an average of 30°C/86°F. If the rains come early, they may begin at the end of the month.
Wet Season November to March – Summer
Although this is the Wet season, it rarely rains much. The first rain will come as a relief after weeks of rising temperatures and humidity. Daytime temperatures average 31°C/88°F.
- November – This is the beginning of the rainy season, although rain is still very sporadic.
- December, January & February – Sometime in December, the rainy season really starts. January is the peak of the rains. Humidity increases and although temperatures are only a little bit higher than in the Dry season, the heat is more oppressive.
- March – It rains less and becomes more sporadic. Everything is fresh from the rains but most days are sunny.