March weather forecast
Grand Usine, French Guiana

The first month of the spring, March, is a hot month in Grand Usine, French Guiana, with an average temperature fluctuating between 21°C (69.8°F) and 30.1°C (86.2°F).

Temperature

The arrival of March brings an average high-temperature of a tropical 30.1°C (86.2°F), nearly identical to February's 29.3°C (84.7°F). In the month of March, Grand Usine's average low-temperature falls to a pleasant 21°C (69.8°F).

Heat index

The heat index for March is computed to be a blistering 40°C (104°F). Incorporate additional preventive steps, heat exhaustion and heat cramps are possible. Long-lasting activity may cause heatstroke.
Keep in mind the heat index values are meant for areas in shade and with light wind. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. Consider the fact that direct sun exposure can influence how hot one feels, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. 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.
Evaporating sweat, thanks to perspiration, acts as a natural air conditioner for the human body. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In March, the average relative humidity in Grand Usine, French Guiana, is 86%.

Rainfall

In Grand Usine, in March, it is raining for 26.8 days, with typically 82mm (3.23") of accumulated precipitation. Throughout the year, in Grand Usine, French Guiana, there are 265.5 rainfall days, and 1078mm (42.44") of precipitation is accumulated.

Daylight

In March, the average length of the day in Grand Usine is 12h and 6min.
On the first day of the month, sunrise is at 06:42 and sunset at 18:45. On the last day of March, in Grand Usine, sunrise is at 06:31 and sunset at 18:40 -03.

Sunshine

In March, the average sunshine is 4.7h.

UV index

The months with the lowest UV index are January, March and December, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: The UV index of 5 during March leads to these advisories:
Guard yourself - An obligation to protect skin and eyes from harm exists. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.