September weather forecast
Bois Couronné, French Guiana

September in Bois Couronné introduces the city to the year's least rainy period. The transition from the sweltering heat of August brings cooler daytime temperatures and a drier atmosphere. Tracking changes from the previous month, rainfall falls to 26mm (1.02"), marking the driest month of the year. As the month ends, the city gradually heads towards its final climatic phase with a decrease in temperature and increase in rainfall in October.

Temperature

Bois Couronné registers an average high-temperature of a still hot 32.7°C (90.9°F) at the commencement of September, closely related to the preceding month. The temperature in Bois Couronné dips to an average of 22.5°C (72.5°F) during September nights.

Heat index

During September, the heat index is estimated at a burning hot 47°C (116.6°F). Heed: Expect heat cramps and heat exhaustion. Continued action may cause heatstroke.
Note that heat index values are valued for light wind and location in the shade. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a single figure representing how weather conditions feel when combining temperature and humidity. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. When there is abundant moisture in the air, the body's cooling through the evaporation process becomes less effective, leading to the sensation of overheating. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.

Humidity

In Bois Couronné, the average relative humidity in September is 79%.

Rainfall

In Bois Couronné, in September, it is raining for 11.5 days, with typically 26mm (1.02") of accumulated precipitation. Throughout the year, in Bois Couronné, French Guiana, there are 253 rainfall days, and 878mm (34.57") of precipitation is accumulated.

Daylight

The average length of the day in September is 12h and 8min.
On the first day of September in Bois Couronné, sunrise is at 06:28 and sunset at 18:40. On the last day of the month, sunrise is at 06:22 and sunset at 18:26 -03.

Sunshine

September has the most sunshine of the year in Bois Couronné, with an average of 9.1h of sunshine.

UV index

The months with the highest UV index in Bois Couronné are July through November, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In September, the maximum UV index of 7 translates into these guidelines:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.