Climate Chart Isalo National Park – 392-1,199m / 1,286-3,934ft
Isalo National Park has a dry, tropical climate. There is relatively little rain and it mostly falls in the Wet season months of 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, when 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 – Though rains may linger into early April, these months mark the beginning of the Dry season. It remains hot, with daytime temperatures averaging 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 what rain you get is more intermittent. Everything is fresh from the rains, but most days are sunny.