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The climate of French Guiana is equatorial, hot and humid with little variation in temperatures throughout the year. In fact, the average annual temperature is 27 ° C. While the average minimum temperatures remain stable throughout the year around 23 ° C, and the average maximum temperatures vary between 29 ° C and 33 ° C.
The climate of French Guiana has seasonal variations based almost exclusively on the rainfall regime. They vary significantly on a seasonal basis due to the influence of the trade winds and the warm sea currents that flow near the coast of the country.
The dry season is in the months from August to November. While the rainy season is between December and July. May is the rainiest month. The average annual rainfall is around 2,500 / 3,500 mm. The rainiest area of the country is the north – east region, here rainfall can reach 4,000 mm of rain per year. The north-west regions are less rainy, the rainfall here drops to values of less than 2,000 mm per year.
The capital Cayenne has an annual average of over 220 rainy days. The humidity remains high throughout the year. Generally, humidity values vary between 80 and 90%.
WHEN TO GO TO THE FRENCH GUYANA
The best time to travel to French Guiana is the driest months between August and November. In the other months, however, the rains are very intense.
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THE CLIMATGE OF FRENCH GUIANA: CLIMATIC TABLES
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| CAYENNE (7 meters) | ||||
| Month | Average low (°C) | Average high (°C) | Precip. (mm) | Precip. days |
| January | 23,3 | 29,1 | 451,2 | 23,6 |
| February | 23,4 | 29,2 | 309,4 | 20,0 |
| March | 23,5 | 29,6 | 334,3 | 20,6 |
| April | 23,7 | 29,9 | 448,4 | 22,2 |
| May | 23,5 | 29,9 | 579,4 | 26,4 |
| June | 22,9 | 30,2 | 411,4 | 25,1 |
| July | 22,4 | 30,8 | 245,7 | 20,6 |
| August | 22,4 | 31,6 | 143,6 | 14,2 |
| September | 22,2 | 32,1 | 55,7 | 7,1 |
| October | 22,3 | 32,2 | 63,3 | 7,6 |
| November | 22,5 | 31,5 | 133,4 | 11,9 |
| December | 23,1 | 30,1 | 340,5 | 21,6 |
| YEAR | 22,9 | 30,5 | 3516,3 | 221,1 |
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