December weather forecast
Fortuné, French Guiana

December, the first month of the winter in Fortuné, is also a moderately hot month, with an average temperature ranging between min 24.5°C (76.1°F) and max 28.8°C (83.8°F).

Temperature

The advent of December reveals an average high-temperature of a moderately hot 28.8°C (83.8°F), showing minimal difference from the prior month. Fortuné's nocturnal readings in December exhibit minimal variation from the daytime temperatures, averaging at 24.5°C (76.1°F).

Heat index

December's heat index is calculated to be a fiery hot 35°C (95°F). Incorporate additional preventive steps, heat exhaustion and heat cramps are possible. Long-lasting activity may cause heatstroke.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
Perspiring is a crucial mechanism for the human body, allowing it to release excessive warmth through evaporating sweat. In conditions of both high temperature and humidity (a high heat index), sweating is limited and the perception of heat is enhanced. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.

Humidity

In December, the average relative humidity is 83%.

Rainfall

In Fortuné, during December, the rain falls for 25.2 days and regularly aggregates up to 204mm (8.03") of precipitation. In Fortuné, 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 18:14. On the last day of December, sunrise is at 06:36 and sunset at 18:28 -03.

Sunshine

In Fortuné, French Guiana, the average sunshine in December 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 vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: In December, a daily UV index of 6 turns into the following recommendations:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Boost your sun resistance with garments that are densely woven yet spacious.