September weather forecast
Bernardin, French Guiana

The first month of the autumn, September, is still a hot month in Bernardin, French Guiana, with an average temperature varying between 34.1°C (93.4°F) and 20.5°C (68.9°F).

Temperature

September's climate shows a minor adjustment in average high-temperatures to a still tropical 34.1°C (93.4°F) from August's 32.8°C (91°F). Bernardin logs a substantial downturn to a pleasant 20.5°C (68.9°F) during September nights, a considerable shift from daytime highs.

Heat index

In September, the average heat index is estimated at a blazing hot 49°C (120.2°F). On guard: Heat exhaustion and heat cramps are predicted. Heatstroke is a potential hazard with continuous physical effort.
Consider that heat index readings are for situations in the shade and light wind. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
As a reaction to high temperatures, the human body begins to perspire, using the evaporation of sweat to lower its temperature. 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

In September, the average relative humidity is 74%.

Rainfall

In September, in Bernardin, the rain falls for 14.3 days. Throughout September, 36mm (1.42") of precipitation is accumulated. In Bernardin, during the entire year, the rain falls for 265.5 days and collects up to 1078mm (42.44") of precipitation.

Daylight

In September, the average length of the day in Bernardin, French Guiana, is 12h and 8min.
On the first day of the month, sunrise is at 06:29 and sunset at 18:40. On the last day of September, in Bernardin, sunrise is at 06:21 and sunset at 18:27 -03.

Sunshine

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

UV index

August through November, with an average maximum UV index of 7, are months with the highest UV index in Bernardin, French Guiana. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: The UV index of 7 during September translates into the following guidance:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.