September weather forecast
Roche Tablon, French Guiana

The first month of the autumn, September, is still a tropical month in Roche Tablon, French Guiana, with an average temperature fluctuating between 24.5°C (76.1°F) and 31.5°C (88.7°F).

Temperature

Roche Tablon experiences a minor change to a still hot 31.5°C (88.7°F) in average high-temperature during September, closely reflecting August. In the month of September, the average low-temperature in Roche Tablon usually rests at a warm 24.5°C (76.1°F).

Heat index

September's mean heat index is appraised at a blistering 41°C (105.8°F). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', takes into account both air temperature and humidity to illustrate what people actually feel. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly important for children. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. Elevated relative humidity disrupts typical body cooling by reducing the evaporation rate, consequently decreasing the body's cooling rate and enhancing the feeling of heat. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.

Humidity

The months with the lowest humidity in Roche Tablon are September and October, with an average relative humidity of 76%.

Rainfall

September is the month with the least rainfall in Roche Tablon. Rain falls for 12.2 days and accumulates 23mm (0.91") of precipitation.

Daylight

In Roche Tablon, the average length of the day in September is 12h and 8min.
On the first day of the month, sunrise is at 06:23 and sunset at 18:35. On the last day of September, in Roche Tablon, sunrise is at 06:16 and sunset at 18:21 -03.

Sunshine

The month with the most sunshine is September, with an average of 9.2h of sunshine.

UV index

June through November, with an average maximum UV index of 7, are months with the highest UV index in Roche Tablon, French Guiana. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In September, the UV index of 7 transforms into the following advice:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.