December weather forecast
Roura, French Guiana

December heralds the year-end with increasing rainfall, amounting to 204mm (8.03"). The characteristic warm tropical climate persists with the typical high relative humidity. This month also witnesses heightened wind gusts which serve, along with the increased precipitation, as indicators of the upcoming wet season. Despite the turn in weather conditions, there are still around 7.3 hours of sunshine per day to enjoy. As we transition into a new year, unchanged temperature and escalating precipitation levels remain as hallmarks of January.

Temperature

Roura's December reports an average high-temperature of a warm 28.8°C (83.8°F), exhibiting a minor difference from November. During the month of December, Roura's average nighttime temperature closely mirrors its daytime counterpart, at 24.5°C (76.1°F).

Heat index

In December, the average heat index is calculated to be a sweltering 35°C (95°F). Take extra safety measures to prevent heat exhaustion and heat cramps. Heatstroke could follow lengthy activity.
When referencing the heat index, its values are suitable for shady environments and light breezes. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', quantifies the warmth felt when relative humidity is considered. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Juveniles are regularly less conscious of the need to recuperate and rehydrate. Thirst is a tardy symptom of dehydration - hydration, especially during lengthy physical activities, should be maintained.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. Higher relative humidity impedes evaporation, thus reducing heat dispersion from the body, culminating in a sensation of overheating. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.

Humidity

In December, the average relative humidity is 83%.

Rainfall

In December, in Roura, the rain falls for 25.2 days. Throughout December, 204mm (8.03") of precipitation is accumulated. In Roura, during the entire year, the rain falls for 277 days and collects up to 1707mm (67.2") of precipitation.

Daylight

The month with the shortest days in Roura, French Guiana, is December, with an average of 11h and 54min of daylight.
On the first day of December in Roura, sunrise is at 06:22 and sunset at 18:14. On the last day of the month, sunrise is at 06:36 and sunset at 18:28 -03.

Sunshine

In December, the average sunshine is 7.3h.

UV index

The months with the lowest UV index are January through May and December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: In December, an average UV index of 6 transforms into the following instructions:
Deflect overexposure. Sun protection is a necessity. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.