September weather forecast
Tokonou, Guinea

As September rolls in, the intensity of the rainy season begins to diminish, bringing about noticeable changes in the overall weather pattern. The dramatic decrease in rainfall levels to 126mm (4.96") relative to August signifies the rain season's impending end. However, the overcast conditions combined with cooler temperatures continue to dominate. The decrease in rainfall amounts does not immediately lead to a drop in humidity, which remains high throughout the month. September is a transformation phase where both flora and fauna adapt to changing weather conditions.

Temperature

Entering September, Tokonou's average high-temperature reads a still moderately hot 29.3°C (84.7°F), indicating a close resemblance to the previous month's climate. An average nighttime temperature of 20.8°C (69.4°F) is observed during September.

Heat index

In September, the average heat index is appraised at a very hot 37°C (98.6°F). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.
Heat index values are typically calculated for conditions of shade and a light breeze. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', arises from combining readings of air temperature and relative moisture content. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.

Humidity

In September, the average relative humidity in Tokonou is 87%.

Rainfall

In September, the rain falls for 25.8 days. Throughout September, 126mm (4.96") of precipitation is accumulated. Throughout the year, in Tokonou, there are 154.5 rainfall days, and 814mm (32.05") of precipitation is accumulated.

Daylight

The average length of the day in September in Tokonou is 12h and 11min.
On the first day of the month, sunrise is at 06:30 and sunset at 18:47. On the last day of September, sunrise is at 06:27 and sunset at 18:30 GMT.

Sunshine

The average sunshine in September in Tokonou is 7.8h.

UV index

July through September and December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: The daily high UV index of 6 during September translates into the following recommendations:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.