Cayenne weather in August
August in Cayenne: hot, soaked, with clean air — fine if you can take 21 rainy days.
#3 of 12 months in Cayenne · #651 of 897 destinations to visit in August · comfort 69/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Cayenne in August
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Cayenne climate normals — August
| Daytime high | 30°C / 87°F | 🥵 hot |
|---|---|---|
| Nighttime low | 24°C / 75°F | |
| Rainfall | 152 mm / 6 in | ⛈ soaked |
| Rainy days | 21 days | |
| Humidity | 80% | 💦 very humid |
| Dew point | 23°C / 73°F | |
| Sunshine | 10.6 h/day | |
| Daylight | 12.3 h | |
| Wind | 14 km/h / 9 mph | |
| Air quality (US AQI) | 28 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Cayenne in August — FAQ
- Is August a good time to visit Cayenne?
- August in Cayenne: hot, soaked, with clean air — fine if you can take 21 rainy days. It ranks #3 of 12 months for Cayenne on SeasonMap's comfort score (69/100).
- What is the weather like in Cayenne in August?
- In August, Cayenne averages a daily high of 30.4°C and a low of 23.9°C, with about 151.5 mm of rain over roughly 20.8 rainy days.
- What is the air quality in Cayenne in August?
- Cayenne has a mean US Air Quality Index of about 28 in August.