December weather forecast
Maripasoula, French Guiana

Maripasoula wraps up the year under the spell of an increased cloud cover of 72% and a revival of the wet season, with rainfall touching 112mm (4.41") again. Temperature highs fall further down to 30.8°C (87.4°F), easing off the summer’s heat. With a decrease in daylight hours, December endorses the return of typical tropical weather. Winds maintain their gentle pace, and together with the cooler temperature and vast array of greenery, contribute to the serene ambience in December.

Temperature

December heralds a minor drop in average high-temperature, sliding from November's 34°C (93.2°F) to a still tropical 30.8°C (87.4°F). Throughout December nights, Maripasoula registers an average low-temperature of 20.9°C (69.6°F).

Heat index

In December, the average heat index is calculated to be a blistering 42°C (107.6°F). Undertake special precautions, the probability of heat exhaustion and heat cramps is high. Prolonged activity may provoke heatstroke.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a measure of how hot it feels when the actual air humidity is factored in. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values hold particular significance for children. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.
Perspiration and the resultant sweat evaporation are the body's natural thermostat, helping regulate temperature. During conditions of high air temperature and humidity (high heat index), the body's ability to perspire is inhibited, increasing the sensation of warmth. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In Maripasoula, the average relative humidity in December is 85%.

Rainfall

In Maripasoula, French Guiana, during December, the rain falls for 26.2 days and regularly aggregates up to 112mm (4.41") of precipitation. In Maripasoula, during the entire year, the rain falls for 265.5 days and collects up to 1078mm (42.44") of precipitation.

Daylight

With an average of 11h and 54min of daylight, December has the shortest days of the year in Maripasoula.
On the first day of December, sunrise is at 06:27 and sunset at 18:23. On the last day of the month, sunrise is at 06:41 and sunset at 18:36 -03.

Sunshine

In Maripasoula, the average sunshine in December is 5.6h.

UV index

The months with the lowest UV index are January, March and December, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum UV index of 5 during December leads to these instructions:
Exercise caution. Those with pale skin may experience burns in less than half an hour. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.