Manaus weather in September
September in Manaus: sweltering, a little rain — a good time to visit.
#4 of 12 months in Manaus · #452 of 604 destinations to visit in September · comfort 67/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Manaus climate normals — September
| Daytime high | 33°C / 92°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 25°C / 77°F | |
| Feels like (high) | 39°C / 102°F | |
| Rainfall | 67 mm / 2.6 in | 🌦 some rain |
| Rainy days | 13 days | |
| Humidity | 68% | 💧 humid |
| Dew point | 23°C / 73°F | |
| Sunshine | 10.9 h/day | |
| Daylight | 12.1 h | |
| Wind | 10 km/h / 6 mph | |
| Air quality (US AQI) | 73 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Manaus in September — FAQ
- Is September a good time to visit Manaus?
- September in Manaus: sweltering, a little rain — a good time to visit. It ranks #4 of 12 months for Manaus on SeasonMap's comfort score (67/100).
- What is the weather like in Manaus in September?
- In September, Manaus averages a daily high of 33.4°C and a low of 25.2°C, with about 67.3 mm of rain over roughly 12.8 rainy days.
- What is the air quality in Manaus in September?
- Manaus has a mean US Air Quality Index of about 73 in September.