December weather forecast
Cacao, French Guiana

Concluding the year, December brings with it an increased rainfall of 204mm (8.03"), marking the resurgence of the wet season in Cacao. With a high temperature of 28.8°C (83.8°F), the climate begins to cool down slightly, providing respite from the prolonged warmth. Cloud cover reaches an average of 49%, meaning more grey skies on most days. As daylight continues to decrease slightly, the visibility also reduces marginally. Despite the intensifying weather conditions, the locality continues to thrive under the distinctive climatological conditions.

Temperature

Cacao notes an average high-temperature of a moderately hot 28.8°C (83.8°F) in December, hardly diverging from November. Cacao's nighttime temperature in December shows a minor descent, with a steady average of 24.5°C (76.1°F).

Heat index

December's mean heat index is evaluated at a fiery hot 35°C (95°F). Implement additional cautionary measures, heat cramps and heat exhaustion could occur. Prolonged activity might induce heatstroke.
Consider that heat index readings are for situations in the shade and light wind. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', quantifies the warmth felt when relative humidity is considered. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. Higher relative humidity impedes evaporation, thus reducing heat dispersion from the body, culminating in a sensation of overheating. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

In December, the average relative humidity is 83%.

Rainfall

In Cacao, during December, the rain falls for 25.2 days and regularly aggregates up to 204mm (8.03") of precipitation. In Cacao, during the entire year, the rain falls for 277 days and collects up to 1707mm (67.2") of precipitation.

Daylight

With an average of 11h and 54min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 06:22 and sunset at 18:15. On the last day of December, sunrise is at 06:37 and sunset at 18:29 -03.

Sunshine

In Cacao, the average sunshine in December is 7.3h.

UV index

January through May and December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: In December, an average UV index of 6 transforms into the following instructions:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.