French Guiana

French Guiana Weather & Climate: Monthly Averages

Monthly climate averages for French Guiana, temperatures, rainfall and the best time to visit.

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Cayenne Kourou Matoury Cayenne

Climate overview of French Guiana

French Guiana has tropical monsoon climate with a lot of precipitation throughout the year. There is a clear drier period and a long rainy season.The temperature in French Guiana is virtually all year around the tropical value of 30°C (86°F). In the dry season it is usually slightly warmer as the sun shines much more. At night the mercury drops well after midnight to a minimum value of approximately 23°C (73°F) to 24°C (75°F).

In the highlands of the Tumuk Humak mountains in the south of French Guiana it can be slightly cooler. The large amounts of rainfall and high temperatures provide a very high humidity so it may feel very clammy in French Guiana. This tropical dampness is experienced throughout the year.

Explore French Guiana by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Popular cities by month

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Cayenne Kourou Matoury Cayenne Saint Georges Maripasoula

Day temperature (°C)

Monthly rainfall (mm)

Monthly sunshine (hours)

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Climate map

Average daily temperature, monthly rainfall & sunshine hours across cities.

Avg day temp (°C)

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Average daytime and nighttime temperatures, yearly rainfall and sunshine.


Cayenne	29°C (84°F) – 32°C (90°F)	24°C (75°F) – 25°C (77°F)	2591 mm (102 in)	1,980 hours
Kourou	29°C (84°F) – 31°C (88°F)	24°C (75°F) – 25°C (77°F)	2561 mm (101 in)	1,980 hours
Matoury	29°C (84°F) – 32°C (90°F)	23°C (73°F) – 24°C (75°F)	2662 mm (105 in)	2,024 hours
Cayenne	29°C (84°F) – 33°C (91°F)	23°C (73°F) – 24°C (75°F)	2663 mm (105 in)	2,024 hours
Saint Georges	30°C (86°F) – 34°C (93°F)	23°C (73°F) – 23°C (73°F)	2458 mm (97 in)	1,989 hours
Maripasoula	30°C (86°F) – 35°C (95°F)	22°C (72°F) – 23°C (73°F)	1599 mm (63 in)	2,272 hours

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FAQ

What is the best time to visit French Guiana?

The warmest month in Maripasoula is October, with daytime highs of 35°C (95°F). Maripasoula is the sunniest destination, with 259 hours of sunshine in October. French Guiana has distinct dry (September to October) and wet (April to June) seasons. Explore French Guiana weather by month for a detailed breakdown.

What temperatures can I expect in French Guiana?

Maripasoula is the warmest destination, reaching 35°C (95°F) in October with nights around 23°C (73°F). Kourou is the coolest, with July daytime highs of just 29°C (84°F) and nights dropping to 24°C (75°F). Temperatures are relatively stable throughout the year. See the city comparison for a full overview.

How much rain does French Guiana get?

Rainfall varies across French Guiana. Cayenne is the wettest, receiving 2663 mm (105 in) per year, with May the wettest month at 403 mm (16 in). Maripasoula is the driest at 1599 mm (63 in) per year. Use the climate map to explore rainfall patterns across regions.

How sunny is French Guiana?

Maripasoula is the sunniest destination in French Guiana, enjoying 2,272 hours of sunshine per year, with October the brightest month at 259 hours. Overall, French Guiana enjoys abundant sunshine year-round. Compare sunshine across cities in the charts above.

What is the climate like across French Guiana?

Cayenne has very warm summers reaching 32°C (90°F) in October and warm winters dropping to 29°C (84°F), with 1,980 hours of sunshine and 2591 mm (102 in) of rain per year. Kourou has very warm summers reaching 31°C (88°F) in October and warm winters dropping to 29°C (84°F), with 1,980 hours of sunshine and 2561 mm (101 in) of rain per year. Matoury has very warm summers reaching 32°C (90°F) in October and warm winters dropping to 29°C (84°F), with 2,024 hours of sunshine and 2662 mm (105 in) of rain per year. Explore the climate charts and comparison table for more cities.