Het weer in Mamoudzou in december

There's no Mamoudzou-specific forum thread for March, so this leans on the wider Indian Ocean region's pattern rather than a direct traveler account: neighboring islands like Mauritius and Madagascar describe March as hot, humid and genuinely wet, squarely inside the cyclone-season window for this part of the ocean. Mayotte's own climate record fits that regional pattern - warm, rainy, and humid rather than dry - though the destination's own numbers suggest a bit less total rainfall than some of its more exposed neighbors see this time of year.

Forum coverage specific to Mamoudzou's September weather is thin, with most forum activity centered on general trip planning, accommodation and diving logistics rather than granular climate detail. Mayotte sits within the same Indian Ocean seasonal pattern as nearby Madagascar and the Comoros, where the austral winter months (roughly May through October) bring a notably drier, cooler stretch than the hot, wet December-to-March cyclone season - September sits comfortably within that drier window. Given the limited detailed trip reports available, travelers planning a September visit should expect the general pattern of a Southern Hemisphere dry season to hold, with real specifics best confirmed closer to travel dates given how few firsthand accounts exist for this destination.