December weather forecast
Maman Valentin, French Guiana

The first month of the winter, December, is still a tropical month in Maman Valentin, French Guiana, with an average temperature ranging between min 22.7°C (72.9°F) and max 30.2°C (86.4°F).

Temperature

December brings an average high-temperature of a still tropical 30.2°C (86.4°F), nearly identical to the preceding month. Maman Valentin encounters an average low-temperature of 22.7°C (72.9°F) during December nights.

Heat index

For December, the heat index is computed to be a sweltering 39°C (102.2°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
It is important to note that the heat index values are for shaded areas and light wind scenarios. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', gauges the sensation of temperature factoring in the air's moisture content. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
As a reaction to high temperatures, the human body begins to perspire, using the evaporation of sweat to lower its temperature. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

In December, the average relative humidity is 83%.

Rainfall

In Maman Valentin, in December, it is raining for 21.9 days, with typically 84mm (3.31") of accumulated precipitation. In Maman Valentin, during the entire year, the rain falls for 253 days and collects up to 878mm (34.57") of precipitation.

Daylight

With an average of 11h and 48min of daylight, December has the shortest days of the year in Maman Valentin.
On the first day of December, sunrise is at 06:28 and sunset at 18:19. On the last day of the month, sunrise is at 06:43 and sunset at 18:32 -03.

Sunshine

The average sunshine in December is 6.6h.

UV index

The months with the lowest UV index in Maman Valentin, French Guiana, are January through June and December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for average individuals.
Note: In December, the UV index of 6 transforms into the following advice:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.