October weather forecast
La Grève, French Guiana

October, the same as September, in La Grève, French Guiana, is a hot autumn month, with an average temperature fluctuating between 34.9°C (94.8°F) and 20.8°C (69.4°F).

Temperature

During the warmest month, October, temperatures average a high of 34.9°C (94.8°F) and a low of 20.8°C (69.4°F).

Heat index

Throughout October, the heat index is appraised at a life-threatening hot 51°C (123.8°F). Prudent: Heat cramps and heat exhaustion are likely. Heatstroke becomes imminent with sustained exertion.
When referencing the heat index, its values are suitable for shady environments and light breezes. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
To achieve cooling, the human body employs perspiration, relying on the subsequent evaporation of sweat. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.

Humidity

October is the least humid month in La Grève, with an average relative humidity of 72%.

Rainfall

October is the month with the least rainfall. Rain falls for 10.4 days and accumulates 21mm (0.83") of precipitation.

Daylight

The average length of the day in October in La Grève is 12h and 2min.
On the first day of October, sunrise is at 06:21 and sunset at 18:26. On the last day of the month, sunrise is at 06:18 and sunset at 18:17 -03.

Sunshine

September and October, with an average of 8.8h of sunshine, are months with the most sunshine in La Grève.

UV index

August through November, with an average maximum UV index of 7, are months with the highest UV index in La Grève. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: In October, the maximum UV index of 7 suggests these recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.