September weather forecast
Yetsou, Gabon

The first month of the spring, September, is still a tropical month in Yetsou, Gabon, with an average temperature varying between 21.5°C (70.7°F) and 30.5°C (86.9°F).

Temperature

Yetsou's entry into September measures an average high-temperature of a still tropical 30.5°C (86.9°F), closely parallel to the preceding month. The mean low-temperature during September nights in Yetsou, Gabon, is a pleasant 21.5°C (70.7°F).

Heat index

The heat index value during September is calculated to be a very hot 39°C (102.2°F). Take more safety measures, heat exhaustion and heat cramps are potential outcomes. Persistent activity might lead to heatstroke.
It is important to note that the heat index values are for shaded areas and light wind scenarios. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', ties air temperature with relative humidity to produce the perceived temperature sensation. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.
To cool down, the human body relies on perspiration, a process where excessive heat is eliminated as sweat evaporates. When relative humidity is at high levels, the evaporation rate lessens, causing the body to keep more heat than it would in less humid conditions. Rising body temperatures resulting from an imbalance in heat absorption can lead to potential thermal issues.

Humidity

In September, the average relative humidity in Yetsou is 78%.

Rainfall

In Yetsou, in September, during 22.6 rainfall days, 84mm (3.31") of precipitation is typically accumulated. In Yetsou, Gabon, during the entire year, the rain falls for 297.6 days and collects up to 1831mm (72.09") of precipitation.

Daylight

The average length of the day in September in Yetsou is 12h and 6min.
On the first day of the month, sunrise is at 06:14 and sunset at 18:19. On the last day of September, in Yetsou, sunrise is at 06:03 and sunset at 18:10 WAT.

Sunshine

September has the least sunshine of the year in Yetsou, with an average of 5.3h of sunshine.

UV index

In Yetsou, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for average individuals.
Note: In September, the maximum UV index of 6 suggests this advice:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.