Cayenne (French Guiana) weather in January

January in Cayenne: hot, soaked, with clean air — a gamble, with 24 rainy days.

Updated September 2026 · climate normals from ERA5 reanalysis

Cayenne French Guiana · Guianas & Northern Brazil · City60
  1. 60Jan
  2. 57Feb
  3. 63Mar
  4. 50Apr
  5. 49May
  6. 52Jun
  7. 58Jul
  8. 69Aug
  9. 73Sep
  10. 72Oct
  11. 63Nov
  12. 53Dec

#6 of 12 months in Cayenne · #955 of 1413 destinations to visit in January · comfort 60/100 (tier C)

Days
28°C
Nights
24°C
Wet days
24
Sun
9.2 h
Humidity
85%
Daylight
12 h
Cayenne, French Guiana
Photo: Wilfried · Pexels

Traveller notes on Cayenne in January

Other months in Cayenne

Forum posters visiting Cayenne describe French Guiana as consistently hot and humid, though several are careful to note it wasn't as brutal as a Florida summer despite the tropical setting. One reviewer visiting Devil's Island specifically called the historical site fascinating but genuinely hot and humid, a pattern posters describe as fairly constant across the destination rather than tied to any one month. Given the limited destination-specific detail for March exactly, this note leans on French Guiana's broader equatorial pattern: March sits within the wetter half of the year here, with substantial rainfall and high humidity typical of this stretch of the northern South American coast. Posters generally rate March as hot, humid and genuinely wet for Cayenne, in line with the destination's consistently tropical character.
Tripadvisor community · March · 1 month ago · Read more on Tripadvisor ↗
Forum posters describe French Guiana's climate in blunt terms - extremely hot and humid - though one visitor specifically compared it favorably to a Florida summer, finding it not quite as bad as expected. Posters describe nearby Devil's Island as a fascinating historical site despite the genuinely intense heat and humidity on site. Posters note at least one trip specifically planned for the August-September stretch, paired with neighboring Suriname and Guyana, suggesting this window is a workable time for a wider Guianas itinerary. Given the limited detailed trip reports available for Cayenne specifically, posters generally describe France's infrastructure standards - European-caliber hotels, restaurants and medical care - as a real practical upside for visitors regardless of exactly which month they choose.
Tripadvisor community · September · 1 month ago · Read more on Tripadvisor ↗

Add your own note from Cayenne's card on the map.

Cayenne climate normals — January

Daytime high28°C / 82°F🥵 hot
Nighttime low24°C / 74°F
Feels like (high)31°C / 88°F
Sea temperature27°C / 80°F😎 warm sea
Rainfall257 mm / 10.1 in⛈ soaked
Rainy days24 days
Humidity85%💦 very humid
Dew point22°C / 72°F
Sunshine9.2 h/day
Daylight11.9 h
Wind18 km/h / 11 mph
Air quality (US AQI)43🍃 good

Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.

Crowds in Cayenne in January

How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.

BusyCarnaval de Guyane, school holidays in 4 of the markets that fill it(estimated)

JFMAMJJASOND

Peak crowdsBusyShoulder seasonQuiet

Best months for Cayenne's weather

Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).

Fair weatherCayenne's weather peaks August–October, best around September.

JFMAMJJASOND

Best weatherFair weatherToughest weather

What's on in Cayenne in January

Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.

  • Festival

    Carnaval de Guyane

    6 Jan – 18 FebCarnivalCrowded

    Six weeks rather than a weekend: Sunday parades through Cayenne and, on Saturday nights, the touloulou balls where masked women in full costume pick the men to dance and nobody may refuse. It ends with Vaval burned. Source ↗

  • Season

    Wet season

    MonsoonRisk

    24 rainy days and about 257 mm in the month — the real kind of rainy season, not afternoon showers.

    from the climate normals

What's on around the world in January →

Where is Cayenne?

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Cayenne in January — FAQ

Is January a good time to visit Cayenne?
January in Cayenne: hot, soaked, with clean air — a gamble, with 24 rainy days. It ranks #6 of 12 months for Cayenne on SeasonMap's comfort score (60/100).
What is the weather like in Cayenne in January?
In January, Cayenne averages a daily high of 27.6°C and a low of 23.5°C, with about 256.8 mm of rain over roughly 24.4 rainy days.
What is the air quality in Cayenne in January?
Cayenne has a mean US Air Quality Index of about 43 in January.