Cayenne weather in December
Temperature, sea and sunshine in December: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in December
Fair
Best time to visit: January – March, September – October
What is the weather like in Cayenne in December?
In December, Cayenne is hot: daytime highs average 28 °C, and even at night it stays warm at around 24 °C. The sea averages 27.5 °C – lovely and warm for swimming. Expect around 5 hours of sunshine a day. It is the rainy season: rain falls on about 27 days, totalling 273 mm. The air is often humid and muggy. All in all, December is a so-so month for a holiday in Cayenne.
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 44 | 49 | 54 |
| Day | 30° | 28° | 28° |
| Night | 24° | 24° | 23° |
| Sea | 28° | 28° | 27° |
| Sun | 7 h | 5 h | 5 h |
| Rain days | 20 | 27 | 26 |
More details for December
- Daylight
- 11 h 50 min06:29 – 18:20
- UV index
- 10 · very highclear sky, noon (estimate)All months
- Muggy days
- 31 daysdew point 18 °C or moreAll months
- Wind
- 17 km/haverage daily peakAll months
- Cloud cover
- 74 %on averageAll months
- Hot days
- 3 days30 °C or moreAll months
- Time zone
- UTC−3America/Cayenne
How the score comes together
- Temperatureweight 50 %83 %
- Sunshineweight 20 %40 %
- Few rainy daysweight 30 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in December
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Insect repellent
- Rain jacket or umbrella
Cayenne in December: quick answers
Is Cayenne hot in December?
Yes. In December, Cayenne is hot: daytime highs average 28 °C and nights stay around 24 °C. On about 3 days the thermometer climbs to 30 °C or more.
Can you swim in Cayenne in December?
Yes. In December the sea averages 27.5 °C – lovely and warm for swimming.
Does it rain much in Cayenne in December?
It rains often – on about 27 days, adding up to 273 mm.
Cayenne month by month
The whole year in CayenneAll destinations: French GuianaWhere to go in DecemberSea temperature in December
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences