Brazzaville weather in September
September in Brazzaville: sweltering, dry — a great time to visit.
#4 of 12 months in Brazzaville · #390 of 604 destinations to visit in September · comfort 73/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Brazzaville climate normals — September
| Daytime high | 32°C / 89°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 22°C / 72°F | |
| Feels like (high) | 35°C / 95°F | |
| Rainfall | 17 mm / 0.7 in | ☀️ dry |
| Rainy days | 5 days | |
| Humidity | 67% | 💧 humid |
| Dew point | 20°C / 67°F | |
| Sunshine | 9.2 h/day | |
| Daylight | 12.1 h | |
| Wind | 11 km/h / 7 mph | |
| Air quality (US AQI) | 82 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Brazzaville in September — FAQ
- Is September a good time to visit Brazzaville?
- September in Brazzaville: sweltering, dry — a great time to visit. It ranks #4 of 12 months for Brazzaville on SeasonMap's comfort score (73/100).
- What is the weather like in Brazzaville in September?
- In September, Brazzaville averages a daily high of 31.7°C and a low of 22.2°C, with about 16.6 mm of rain over roughly 4.8 rainy days.
- What is the air quality in Brazzaville in September?
- Brazzaville has a mean US Air Quality Index of about 82 in September.