French Guiana climate
World Climates covers 1 place in French Guiana. Cayenne has a tropical monsoon climate (Köppen Am).
Climate of Cayenne at a glance
The year average in Cayenne is 26 °C80 °F. The warmest month is October, with an average high of 30 °C85 °F. The coldest is February, with an average low of 24 °C76 °F. About 2,873 mm113 in of precipitation falls in a year. May is the wettest month and September the driest. By our comfort score, the best months to visit are September and October.
Frequently asked questions
How many places in French Guiana does this site cover?
World Climates has climate data for one place in French Guiana: Cayenne. Its page has monthly averages for temperature, rainfall, humidity and daylight.
What is the warmest month in Cayenne?
October is the warmest month, with an average high of 30 °C85 °F. February is the coldest, with an average low of 24 °C76 °F.
When does it rain the most in Cayenne?
May is the wettest month, with about 504 mm20 in of precipitation. The yearly total is about 2,873 mm113 in.
When is the best time to visit Cayenne?
By our comfort score, the most comfortable months are September and October. The score is based on long-term averages, not on a forecast.
Climate of every place in French Guiana
| Place | Year | Max high | Min low | Precip. |
|---|---|---|---|---|
| Cayenne | 26 | 30 | 24 | 2,873 |
Year = annual mean temperature; max high = average high of the warmest month; min low = average low of the coldest month; precip. = annual total. Temperatures in °C°F, precipitation in mminches. Sorted by population.
Data: NASA POWER climatology 2001–2025 (MERRA-2 reanalysis, CERES satellite data) — grid-cell averages, not station records. Sources and method.