December weather forecast
Cayenne, French Guiana

Closing the year, December in Cayenne, French Guiana, revitalizes the city with a tropical festive mood. Wet season blues reoccur with increased rainfall, enveloping the atmosphere with moisture and maintaining fertile ground. Yet, the weather also offers fair amounts of sunlight, presenting a delicate balance between sun and rain. The sea continues to invite lovers of water sports and swimming with its steady temperature. Seasonal changes culminate with a hike in precipitation to 341mm (13.43"), reinstating the intensification of the rainy season.

Temperature

The advent of December in Cayenne reveals an average high-temperature of a still hot 30.1°C (86.2°F), showing minimal difference from the prior month. In the month of December, an average of 23.1°C (73.6°F) marks the low-temperature.

Rainfall

In Cayenne, in December, it is raining for 21.6 days, with typically 341mm (13.43") of accumulated precipitation. In Cayenne, French Guiana, during the entire year, the rain falls for 221.1 days and collects up to 3516mm (138.43") of precipitation.

Sea temperature

In Cayenne, the average seawater temperature in December is 27.9°C (82.2°F).
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) provides warmth and pleasure, making water activities enjoyable for lengthened periods without feeling uncomfortable.

Daylight

The month with the shortest days in Cayenne is December, with an average of 11h and 48min of daylight.
On the first day of December in Cayenne, sunrise is at 06:22 and sunset at 18:14. On the last day of the month, sunrise is at 06:37 and sunset at 18:27 -03.

Sunshine

In Cayenne, the average sunshine in December is 4.4h.

UV index

The months with the lowest UV index are July and December, with an average maximum UV index of 11. A UV Index of 11, and more, symbolizes an ultimate health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: In December, the maximum UV index of 11 transforms into these recommendations:
Ensure every crucial precaution is taken. Individuals with light skin could experience burns in under 5 minutes. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Sunscreen with an SPF of 30 or higher should be applied generously and frequently reapplied even on cloudy days, especially after each swim or outdoor workout. Caution! The Sun's UV intensity grows with reflections off sand and water.