SeasonMapMoroni weather in September
Comoros
September in Moroni: sweltering, dry, with clean air — fine if you can take 36°C afternoons.
#1 of 12 months in Moroni · #50 of 1383 destinations to visit in September · comfort 94/100 (tier S)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Moroni in September
No notes yet. Open Moroni on the map to add the first one.
Moroni climate normals — September
| Daytime high | 31°C / 87°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 22°C / 72°F | |
| Feels like (high) | 36°C / 97°F | |
| Sea temperature | 27°C / 80°F | 😎 warm sea |
| Rainfall | 23 mm / 0.9 in | ☀️ dry |
| Rainy days | 8 days | |
| Humidity | 79% | 💦 very humid |
| Dew point | 21°C / 71°F | |
| Sunshine | 11.3 h/day | |
| Daylight | 12 h | |
| Wind | 11 km/h / 7 mph | |
| Air quality (US AQI) | 31 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Moroni in September
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Busyschool holidays in 2 of the markets that fill it, one of its best months for weather(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Moroni's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Best weatherMoroni's weather peaks August–October, best around September.
September includes Humpbacks in the channel.
Best weatherFair weatherToughest weather
What's on in Moroni in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Nature
Humpbacks in the channel
1 Jul – 31 Oct · usuallyWhale seasonHumpbacks come up the Mozambique Channel to calve and are regularly seen from the Grande Comore coast road in the southern winter. Trips are small operators and dive boats rather than a whale-watching industry.
Where is Moroni?
Moroni in September — FAQ
- Is September a good time to visit Moroni?
- September in Moroni: sweltering, dry, with clean air — fine if you can take 36°C afternoons. It ranks #1 of 12 months for Moroni on SeasonMap's comfort score (94/100).
- What is the weather like in Moroni in September?
- In September, Moroni averages a daily high of 30.5°C and a low of 22.3°C, with about 23.2 mm of rain over roughly 7.8 rainy days.
- What is the air quality in Moroni in September?
- Moroni has a mean US Air Quality Index of about 31 in September.