Ankarana SR has a hot, tropical climate. There is a well-defined Wet and Dry season. December to March are the wet summer months, while April and November are Wet season shoulder months. At this time the average daytime temperature is around 32°C/90°F. Nights are about 10°C/50°F cooler. May to October are the dry winter months with lower humidity and slightly lower temperatures.
Dry season–May to October – Winter
The Dry season months see little rain and temperatures are quite uniform throughout. The average daytime temperature is 30°C/86°F, which drops to around 20°C/68°F at night.
May – This is the beginning of the Dry season. It is still hot with daytime temperatures averaging 31°C/88°F.
June, July, August & September – It cools down a little to daytime temperatures of 29°C/84°F in July and nights are cooler at 19°C/66°F.
October – Temperatures increase slightly to an average of 31°C/88°F. The end of the month might see increased rainfall.
Wet season–November to April – Summer
The Wet season months are humid and hot. It rains a lot and waterproof clothing is essential. Daytime temperatures average at 32°C/90°F.
November – This is the beginning of the rainy season. Real tropical downpours usually won’t start before the end of November.
December, January, February & March – Sometime in December, the rainy season really kicks in and most days see heavy downpours. January sees the peak of the rains. The humidity increases and although temperatures are only a little bit higher than in the Dry season months, the heat is much more oppressive.
April – This is a shoulder month and the heavy rains tends to cease while the humidity decreases. In the daytime it gets to around 32°C/90°F and at night temperatures are around 22°C/72°F.