September weather forecast
Maman Valentin, French Guiana

The first month of the autumn, September, is also a hot month in Maman Valentin, French Guiana, with an average temperature ranging between min 22.5°C (72.5°F) and max 32.7°C (90.9°F).

Temperature

September begins with an average high-temperature of a still tropical 32.7°C (90.9°F), reflecting close similarity to the preceding month. The average nighttime temperature lowers to an agreeable 22.5°C (72.5°F) throughout September.

Heat index

September's mean heat index is computed to be a life-threatening hot 47°C (116.6°F). Watchful: Heat cramps and heat exhaustion are predicted. Continued exertion could lead to heatstroke.
The standards for the heat index are set for locations in shade and under light breezes. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', reflects the feeling of heat when considering both air temperature and humidity. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
Perspiring is a crucial mechanism for the human body, allowing it to release excessive warmth through evaporating sweat. Under conditions of high temperature and humidity (enhanced heat index), sweat production is compromised, exacerbating the sensation of warmth. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.

Humidity

In Maman Valentin, the average relative humidity in September is 79%.

Rainfall

In Maman Valentin, in September, it is raining for 11.5 days, with typically 26mm (1.02") of accumulated precipitation. In Maman Valentin, French Guiana, during the entire year, the rain falls for 253 days and collects up to 878mm (34.57") of precipitation.

Daylight

In Maman Valentin, the average length of the day in September is 12h and 9min.
On the first day of the month, sunrise is at 06:28 and sunset at 18:40. On the last day of September, sunrise is at 06:22 and sunset at 18:26 -03.

Sunshine

The month with the most sunshine in Maman Valentin is September, with an average of 9.1h of sunshine.

UV index

July through November, with an average maximum UV index of 7, are months with the highest UV index in Maman Valentin, French Guiana. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: In September, a daily maximum UV index of 7 leads to the following instructions:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.