Climate averages 1991–2020
Cayenne weather
in August.
A hot, moderately wet month: the joint 3rd warmest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in Cayenne: daytime highs average 30.1°C and nights cool to about 23.7°C. By daytime temperature it is the joint 3rd warmest of the 12 months.
Expect about 67 mm of rain on roughly 14 days, which makes August a moderately wet month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 17 min on an average August day.
The nearest other city in this atlas is Paramaribo (330 km away). In August its highs average 30.0°C, about as warm as Cayenne, with 128 mm of rain.
From August to September, average highs rise by 1.3°C to 31.3°C, and monthly rainfall falls from 67 mm to 23 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Cayenne climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 27.6°C23.3°C | 23.3°C | 244 | 26.6 | 11.912 h |
| February | 27.6°C23.5°C | 23.5°C | 205 | 22.5 | 12.012 h |
| March | 28.1°C23.8°C | 23.8°C | 173 | 23.9 | 12.112 h |
| April | 28.3°C23.8°C | 23.8°C | 257 | 25.0 | 12.212 h |
| May | 28.2°C23.6°C | 23.6°C | 411 | 29.1 | 12.312 h |
| June | 28.3°C23.2°C | 23.2°C | 343 | 28.5 | 12.412 h |
| July | 28.9°C23.2°C | 23.2°C | 186 | 24.8 | 12.412 h |
| August, selected | 30.1°C23.7°C | 23.7°C | 67 | 13.9 | 12.312 h |
| September | 31.3°C24.2°C | 24.2°C | 23 | 7.2 | 12.112 h |
| October | 31.5°C24.3°C | 24.3°C | 39 | 10.1 | 12.012 h |
| November | 30.1°C24.1°C | 24.1°C | 122 | 19.6 | 11.912 h |
| December | 28.4°C23.6°C | 23.6°C | 253 | 26.5 | 11.812 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Paramaribo in AugustSuriname · 330 kmHigh 30.0°C · Low 23.8°C · 128 mm rain
- Macapá in AugustBrazil · 563 kmHigh 30.1°C · Low 24.4°C · 73 mm rain
- Santana in AugustBrazil · 568 kmHigh 30.4°C · Low 24.3°C · 59 mm rain
- Georgetown in AugustGuyana · 676 kmHigh 28.6°C · Low 24.8°C · 161 mm rain
- Breves in AugustBrazil · 764 kmHigh 31.9°C · Low 24.1°C · 39 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Cayenne) is explained once on the Cayenne year overview and on the Sources, method and limits page.