Mombasa weather in September
September in Mombasa: hot, a little rain, with clean air — one of the best months to visit.
#2 of 12 months in Mombasa · #122 of 604 destinations to visit in September · comfort 88/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Mombasa climate normals — September
| Daytime high | 28°C / 82°F | 🥵 hot |
|---|---|---|
| Nighttime low | 23°C / 73°F | |
| Feels like (high) | 31°C / 88°F | |
| Rainfall | 46 mm / 1.8 in | 🌦 some rain |
| Rainy days | 15 days | |
| Humidity | 77% | 💦 very humid |
| Dew point | 21°C / 69°F | |
| Sunshine | 10.9 h/day | |
| Daylight | 12.1 h | |
| Wind | 19 km/h / 12 mph | |
| Air quality (US AQI) | 35 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Mombasa?
Loading map…
Mombasa in September — FAQ
- Is September a good time to visit Mombasa?
- September in Mombasa: hot, a little rain, with clean air — one of the best months to visit. It ranks #2 of 12 months for Mombasa on SeasonMap's comfort score (88/100).
- What is the weather like in Mombasa in September?
- In September, Mombasa averages a daily high of 27.8°C and a low of 23°C, with about 45.5 mm of rain over roughly 15 rainy days.
- What is the air quality in Mombasa in September?
- Mombasa has a mean US Air Quality Index of about 35 in September.