Discover the best time of year, based on historical climate, temperature, and precipitation.
The best weather in Cayenne is from August, September, October. — consistent weather climate
🌡Hot & dry
| Score | 54 | 51 | 53 | 50 | 45 | 47 | 47 | 65 | 70 | 71 | 52 | 51 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Climate | Rainy | Rainy | Hot & rainy | Hot & rainy | Hot & rainy | Hot & rainy | Hot & rainy | Hot & rainy | Hot & dry | Hot & dry | Hot & rainy | Hot & rainy |
| Temperature | 24–27°C | 24–27°C | 24–28°C | 24–28°C | 24–28°C | 24–28°C | 24–29°C | 24–30°C | 25–31°C | 25–31°C | 25–29°C | 24–28°C |
| Feels like | 27–31°C | 27–31°C | 27–32°C | 28–32°C | 28–33°C | 28–33°C | 28–34°C | 29–35°C | 29–36°C | 30–36°C | 29–34°C | 28–32°C |
| Precipitation | 382mm 30 days | 362mm 30 days | 284mm 30 days | 491mm 30 days | 670mm 30 days | 537mm 30 days | 321mm 30 days | 135mm 18 days | 75mm 12 days | 78mm 14 days | 234mm 28 days | 426mm 30 days |
| Sunshine | 6.9h ☀︎ 58% | 6.1h ☀︎ 51% | 6.7h ☀︎ 55% | 5.7h ☀︎ 46% | 4.7h ☀︎ 38% | 6.4h ☀︎ 52% | 9.0h ☀︎ 73% | 11.0h ☀︎ 89% | 11.2h ☀︎ 92% | 11.0h ☀︎ 92% | 8.4h ☀︎ 71% | 6.1h ☀︎ 52% |
| Wind | NE · 19 km/h | NE · 20 km/h | NE · 20 km/h | NE · 19 km/h | E · 17 km/h | E · 15 km/h | E · 14 km/h | E · 15 km/h | E · 17 km/h | E · 17 km/h | E · 17 km/h | E · 18 km/h |
| Humidity (%) | 84% | 83% | 82% | 85% | 89% | 90% | 87% | 83% | 80% | 79% | 84% | 87% |
| Day length | 11.9h | 12.0h | 12.1h | 12.2h | 12.3h | 12.4h | 12.4h | 12.3h | 12.1h | 12.0h | 11.9h | 11.8h |
Running from early January through Ash Wednesday, Cayenne's carnival is one of the longest and most vibrant in the Frenc…
Most travelers arrive in Cayenne during the sodden winter holidays and the marathon of Carnival, ignoring the fact that French Guiana's true dry season arrives only between August and October, when the equatorial deluge finally halts and the Atlantic coast bakes under clear blue skies.
Perched on a rocky promontory where the silt-heavy Cayenne River empties into the Atlantic, Cayenne feels entirely unlike the rest of South America. It is the largest Francophone city on the continent, an overseas corner of France wrapped in dense equatorial humidity, Creole colonial architecture, and the scent of damp red earth. Life moves between wooden verandas and broad public squares lined with towering royal palms. Yet the rhythm here is dictated completely by the sky. For half the year, the atmosphere hangs heavy, letting loose torrential curtains of rain that swallow the town in water. Understanding when the sky clears—and when the rain simply becomes part of the daily pulse—is the difference between an evocative tropical expedition and a week spent trapped under a dripping zinc roof.
If you want to experience Cayenne at its most comfortable, September and October are the definitive months to arrive, with the window opening in late August. This is the heart of the dry season, known locally as the grand dry season, and the transformation of the city is startling. The relentless tropical cloud cover pulls back, replaced by eleven hours of unbroken daily sunlight and a brilliant, sharp equatorial glare.
The air remains fiercely warm—apparent temperatures easily sit in the mid-thirties by early afternoon—but the stifling swampiness of earlier months gives way to steady Atlantic sea breezes. In the late afternoon, locals emerge onto the gravel walks of Place des Palmistes to catch the trade winds, and the viewpoint atop Fort Cépérou offers sweeping, panoramic vistas over the red-tiled roofs and out across the muddy confluence of the Cayenne River without a wall of storm clouds blocking the horizon.
The paradox of this period is that visitor numbers drop noticeably compared to the winter holidays. Because the European school year resumes in September, Cayenne feels calm, domestic, and authentically itself. Walking along the rocky coastal paths around Montabo or sitting along Place des Amandiers at dusk feels leisurely rather than exhausting. You trade the crowds for hot, dry days where outdoor plans never need a contingency plan.
November brings a sudden and dramatic shift. By late autumn, the dry season collapses and the rains return with force. Yet despite the rapidly deteriorating weather, the city swells to its absolute bursting point. December registers the heaviest influx of travelers of the entire year, driven by French civil servants flying home, diaspora families reuniting, and holidaymakers seeking winter heat.
What they find is a city submerged in moisture. December brings immense downpours that fall in intense, sudden cataracts, turning roadside ditches into rushing streams and driving people under shop awnings. The apparent temperature hangs in the low thirties, but with humidity levels peaking, the heat feels thick, clinging, and suffocating.
If you come in December, do not expect sunbathing or easy coastal strolls. The atmosphere is undeniably vibrant and celebratory in the evenings, but navigating the city requires boots that can survive muddy red earth and an acceptance that an afternoon downpour will inevitably wash out your plans. The city is full, the energy is high, and the weather is among the worst of the year.
January through March is dominated by the Cayenne Carnival, one of the longest, wildest, and most culturally distinct celebrations in the Americas. Beginning just after Epiphany and lasting until Ash Wednesday, the festival consumes the entire city. For weeks on end, Sunday afternoons see elaborate, brass-heavy street parades winding past Place des Palmistes, while Saturday nights belong to masked balls ruled by the Touloulou—women disguised from head to toe in voluminous gowns, masks, and gloves, inverting traditional social hierarchies.
From a weather perspective, this period is a volatile mix. January and February are wet, but the storms tend to hit in rhythmic bursts rather than unending gloom, punctuated by periods of warm, brilliant sunshine. By March, the rainfall begins to ease somewhat, making the tail end of Carnival slightly more manageable on foot.
Crowds remain high throughout these three months, and accommodations across the city book out months in advance. You do not visit during Carnival for idyllic weather; you visit to submerge yourself in an extraordinary Creole cultural marathon where torrential afternoon showers simply blend into the sweat and revelry of the street.
Between April and July, the Intertropical Convergence Zone settles squarely over the Guiana shield, delivering the great rainy season. May is the absolute peak of this deluge, dousing Cayenne in astronomical quantities of rain. These are not charming afternoon sprinkles; they are violent, structural downpours that can last for hours at a stretch, rattling deafeningly against metal rooftops and dropping water with sheer physical weight.
By June, the ground is completely saturated, humidity hovers near constant saturation, and the air feels dense enough to chew. Outdoor activities grind to a halt. Exploring the paths around Montabo becomes a treacherous exercise in slipping through red clay mud, and the sea breezes do little to mitigate the oppressive indoor dampness. Sunlight is rationed, with some May weeks seeing only sparse breaks in the charcoal canopy.
July begins a very slow transition toward drier conditions, but downpours remain frequent and heavy. Unless you have specific administrative business or wish to see the Amazonian forest in its rawest, most ferocious hydrological state, this is the window to avoid. The city retreats behind closed shutters, leaving the streets washed clean and largely empty.