December weather forecast
Grigel, French Guiana

December, the first month of the winter in Grigel, is also a hot month, with an average temperature ranging between max 30.8°C (87.4°F) and min 20.9°C (69.6°F).

Temperature

December's onset introduces a mild reduction in the average high-temperature, from a tropical 34°C (93.2°F) in November to a still hot 30.8°C (87.4°F). December brings with it a nighttime average temperature of 20.9°C (69.6°F) in Grigel.

Heat index

December's average heat index is computed to be an extremely hot 42°C (107.6°F). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.
Take note of the fact that heat index values are based on shaded circumstances with light airflows. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a value derived by merging air temperature with the humidity to convey how the climate feels. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. 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.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.

Humidity

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

Rainfall

In Grigel, in December, it is raining for 26.2 days, with typically 112mm (4.41") of accumulated precipitation. Throughout the year, there are 265.5 rainfall days, and 1078mm (42.44") of precipitation is accumulated.

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 06:25 and sunset at 18:22. On the last day of December, in Grigel, sunrise is at 06:39 and sunset at 18:35 -03.

Sunshine

In December, the average sunshine is 5.6h.

UV index

January, March and December, with an average maximum UV index of 5, are months with the lowest UV index. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: In December, an average UV index of 5 transforms into the following instructions:
Make use of precautions - Shielding skin and eyes from injury is a requirement. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.