Climate of French Guiana — Month by Month
Country-wide average for French Guiana. Part of South America, America.
Located in South America, America, French Guiana has a tropical climate. Country-wide average temperatures range from 26°C / 78.8°F in January to 28°C / 82.4°F in September, with annual rainfall totalling around 3260 mm / 128.3 in — driest in September (40 mm / 1.6 in), wettest in May (550 mm / 21.7 in). These are national averages; regional variation can be substantial, especially in geographically diverse countries. For city-level detail see the cities section below, and for state or province breakdowns follow the subdivisions link if available.
Best time to visit French Guiana →
| Month | Temperature | Rainfall | Matches |
|---|---|---|---|
| January | 26°C78.8°F | 350 mm13.8″ | Tropical |
| February | 26°C78.8°F | 300 mm11.8″ | Tropical |
| March | 26.5°C79.7°F | 320 mm12.6″ | Tropical |
| April | 26.5°C79.7°F | 450 mm17.7″ | Tropical |
| May | 26.5°C79.7°F | 550 mm21.7″ | Tropical |
| June | 26°C78.8°F | 400 mm15.7″ | Tropical |
| July | 26.5°C79.7°F | 200 mm7.9″ | Tropical |
| August | 27.5°C81.5°F | 100 mm3.9″ | Tropical |
| September | 28°C82.4°F | 40 mm1.6″ | Sunny & Hot |
| October | 28°C82.4°F | 50 mm2″ | — |
| November | 27.5°C81.5°F | 150 mm5.9″ | Tropical |
| December | 26.5°C79.7°F | 350 mm13.8″ | Tropical |
Frequently asked questions
What is the best time to visit French Guiana?
The best months to visit French Guiana for sunny, dry weather are September. The warmest month is September (28°C / 82.4°F average), and the driest is September (~40 mm / 1.6 in rainfall).
What is the climate of French Guiana?
French Guiana has country-wide monthly average temperatures ranging from 26°C / 78.8°F in January to 28°C / 82.4°F in September. Annual rainfall averages about 3260 mm / 128.3 in, with the wettest month being May (550 mm / 21.7 in) and the driest September (40 mm / 1.6 in). Regional variation within French Guiana can be significant — see subdivision or city pages for detail.
What is the hottest month in French Guiana?
The hottest month in French Guiana is September, with a country-wide average temperature of 28°C / 82.4°F.
What is the coldest month in French Guiana?
The coldest month in French Guiana is January, with a country-wide average temperature of 26°C / 78.8°F.
When does it rain most in French Guiana?
The wettest month in French Guiana is May, averaging about 550 mm / 21.7 in of rain. The driest is September with about 40 mm / 1.6 in.