Niamey weather in September
September in Niamey: sweltering, dry, with clean air — a good time to visit.
#5 of 12 months in Niamey · #471 of 604 destinations to visit in September · comfort 65/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Niamey climate normals — September
| Daytime high | 35°C / 95°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 25°C / 77°F | |
| Feels like (high) | 40°C / 104°F | |
| Rainfall | 27 mm / 1.1 in | ☀️ dry |
| Rainy days | 5 days | |
| Humidity | 64% | 💧 humid |
| Dew point | 22°C / 71°F | |
| Sunshine | 10.7 h/day | |
| Daylight | 12.2 h | |
| Wind | 16 km/h / 10 mph | |
| Air quality (US AQI) | 33 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Niamey?
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Niamey in September — FAQ
- Is September a good time to visit Niamey?
- September in Niamey: sweltering, dry, with clean air — a good time to visit. It ranks #5 of 12 months for Niamey on SeasonMap's comfort score (65/100).
- What is the weather like in Niamey in September?
- In September, Niamey averages a daily high of 34.8°C and a low of 25°C, with about 27.4 mm of rain over roughly 5 rainy days.
- What is the air quality in Niamey in September?
- Niamey has a mean US Air Quality Index of about 33 in September.