Cayenne weather in September
September in Cayenne: hot, a little rain, with clean air — one of the best months to visit.
#1 of 12 months in Cayenne · #620 of 897 destinations to visit in September · comfort 73/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Cayenne in September
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Cayenne climate normals — September
| Daytime high | 32°C / 89°F | 🥵 hot |
|---|---|---|
| Nighttime low | 24°C / 76°F | |
| Rainfall | 70 mm / 2.7 in | 🌦 some rain |
| Rainy days | 11 days | |
| Humidity | 75% | 💦 very humid |
| Dew point | 23°C / 73°F | |
| Sunshine | 10.8 h/day | |
| Daylight | 12.1 h | |
| Wind | 15 km/h / 9 mph | |
| Air quality (US AQI) | 27 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Cayenne in September — FAQ
- Is September a good time to visit Cayenne?
- September in Cayenne: hot, a little rain, with clean air — one of the best months to visit. It ranks #1 of 12 months for Cayenne on SeasonMap's comfort score (73/100).
- What is the weather like in Cayenne in September?
- In September, Cayenne averages a daily high of 31.7°C and a low of 24.4°C, with about 69.8 mm of rain over roughly 10.8 rainy days.
- What is the air quality in Cayenne in September?
- Cayenne has a mean US Air Quality Index of about 27 in September.