August weather forecast
Grand Usine, French Guiana

The last month of the summer, August, is another tropical month in Grand Usine, French Guiana, with an average temperature varying between 20.5°C (68.9°F) and 32.8°C (91°F).

Temperature

August registers an average high-temperature of a still tropical 32.8°C (91°F), slightly varied from July's 31.1°C (88°F). August nights in Grand Usine, French Guiana, indicate a noticeable temperature drop from the daytime highs, with an average reading lowering to an agreeable 20.5°C (68.9°F).

Heat index

The heat index value during August is computed to be a life-threatening hot 47°C (116.6°F). Guard: Heat exhaustion and heat cramps are foreseeable. Prolonged effort may bring about heatstroke.
Always consider that heat index estimations are for light winds and places in the shade. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', comes about by integrating the temperature readings with the humidity levels. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
Perspiration is the body's default response to elevated temperatures, as it promotes the evaporation of sweat to achieve cooling. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

The average relative humidity in August is 79%.

Rainfall

In August, the rain falls for 18.8 days. Throughout August, 76mm (2.99") of precipitation is accumulated. In Grand Usine, during the entire year, the rain falls for 265.5 days and collects up to 1078mm (42.44") of precipitation.

Daylight

In August, the average length of the day is 12h and 13min.
On the first day of August in Grand Usine, sunrise is at 06:30 and sunset at 18:45. On the last day of the month, sunrise is at 06:26 and sunset at 18:37 -03.

Sunshine

In Grand Usine, the average sunshine in August is 8.6h.

UV index

The months with the highest UV index are August through November, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: An average UV index of 7 in August transforms into this advice:
Resist overexposure. Safeguarding from solar damage is indispensable. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.