September in Antsiranana averages a daily high of 30.5°C with nights around 20.1°C. Expect roughly 7 wet days totalling 9.9mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Antsiranana is June–August.
Based on ANTSIRANANA, MA (3.7km), 1995–2024. 25 years of September data.