December weather forecast
Émerillon, French Guiana

The first month of the winter, December, is still a tropical month in Émerillon, French Guiana, with an average temperature fluctuating between 30.8°C (87.4°F) and 20.9°C (69.6°F).

Temperature

December's arrival coincides with a soft drop in the average high-temperature, subtly decreasing from November's tropical 34°C (93.2°F) to a still hot 30.8°C (87.4°F). The temperature lowers to an average of 20.9°C (69.6°F) during December nights.

Heat index

During December, the heat index is evaluated at a blistering 42°C (107.6°F). Implement additional preventive actions, heat cramps and heat exhaustion are potential hazards. Heatstroke could follow prolonged activity.
Heat index details are generally centered around shaded locations and a mild breeze. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a composite of temperature and humidity figures to convey how warm it feels. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
In response to overheating, the human body perspires to cool down, mainly through the evaporation of sweat. Under conditions of increased relative humidity, the evaporation rate lessens, causing the body to retain more heat than under less humid conditions. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.

Humidity

In December, the average relative humidity is 85%.

Rainfall

In Émerillon, during December, the rain falls for 26.2 days and regularly aggregates up to 112mm (4.41") of precipitation. Throughout the year, there are 265.5 rainfall days, and 1078mm (42.44") of precipitation is accumulated.

Daylight

The month with the shortest days in Émerillon, French Guiana, is December, with an average of 11h and 54min of daylight.
On the first day of the month, sunrise is at 06:23 and sunset at 18:19. On the last day of December, sunrise is at 06:37 and sunset at 18:33 -03.

Sunshine

The average sunshine in December is 5.6h.

UV index

The months with the lowest UV index in Émerillon are January, March and December, with an average maximum UV index of 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for average individuals.
Note: In December, a daily maximum UV index of 5 leads to the following instructions:
Take measures. Individuals with light skin might experience burns in under 30 minutes. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.