Nairobi weather in September
September in Nairobi: warm, a little rain — one of the best months to visit.
#1 of 12 months in Nairobi · #14 of 604 destinations to visit in September · comfort 94/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Nairobi climate normals — September
| Daytime high | 24°C / 76°F | 🌤 warm |
|---|---|---|
| Nighttime low | 14°C / 57°F | |
| Feels like (high) | 24°C / 75°F | |
| Rainfall | 37 mm / 1.5 in | 🌦 some rain |
| Rainy days | 4 days | |
| Humidity | 64% | 💧 humid |
| Dew point | 11°C / 52°F | |
| Sunshine | 9.8 h/day | |
| Daylight | 12.1 h | |
| Wind | 14 km/h / 8 mph | |
| Air quality (US AQI) | 53 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Nairobi in September — FAQ
- Is September a good time to visit Nairobi?
- September in Nairobi: warm, a little rain — one of the best months to visit. It ranks #1 of 12 months for Nairobi on SeasonMap's comfort score (94/100).
- What is the weather like in Nairobi in September?
- In September, Nairobi averages a daily high of 24.2°C and a low of 13.9°C, with about 37 mm of rain over roughly 4.4 rainy days.
- What is the air quality in Nairobi in September?
- Nairobi has a mean US Air Quality Index of about 53 in September.