September weather forecastAyem, Gabon

Weather in September

September introduces Ayem, Gabon to another phase in weather with a subtle shift towards more humidity and rainfall. There is a significant increase in rainfall volume from 68mm (2.68") of August to 146mm (5.75") in September. Despite the increased humidity, temperatures remain relatively stable, ensuring a consistent climate. Amidst the rainy days, the locals see more cloud cover, which affects the daytime illumination noticeably.

Temperature

Ayem's average high-temperature in September is a still warm 29.1°C (84.4°F), indicating a subtle variation from August. September in Ayem is noted for a mean low-temperature of 20.7°C (69.3°F).

Heat index

The heat index value for September is calculated to be a torrid 37°C (98.6°F). Exercise increased caution, heat cramps and heat exhaustion are potential hazards. Continuous activity could lead to heatstroke.
Data suggests that the heat index is set for environments in shade and with a light wind. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is an aggregate value of air's warmth and moisture to show the human-felt temperature. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. In the presence of high relative humidity, the evaporation rate diminishes, resulting in the body retaining more warmth compared to dry conditions. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

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

Rainfall

In Ayem, in September, it is raining for 26.1 days, with typically 146mm (5.75") of accumulated precipitation. In Ayem, during the entire year, the rain falls for 313.6 days and collects up to 1610mm (63.39") of precipitation.

Daylight

The month with the shortest days is September, with an average of 12h and 6min of daylight.
On the first day of the month, sunrise is at 06:11 and sunset at 18:17. On the last day of September, sunrise is at 06:00 and sunset at 18:07 WAT.

Sunshine

In Ayem, the average sunshine in September is 5.5h.

UV index

September and October, with an average maximum UV index of 5, are months with the lowest UV index. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: The daily high UV index of 5 in September translates into this advice:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.