September weather forecastBiro, Benin

Weather in September

September signals a shift towards the end of the rainy season, as rainfall decreases distinctly from August. Consequently, the cloud cover starts to disperse, increasing daylight hours and visibility when compared to the previous month. The cooler temperatures begin to rise again, signaling the start of the warmer period. Despite decreasing rainfall, relative humidity remains high, keeping the atmosphere moist. Wind speed increases slightly, aiding in the ventilation of the surroundings.

Temperature

September's average high-temperature stands at a still moderately hot 29.4°C (84.9°F), showing little deviation from August's 28.4°C (83.1°F). In Biro, the average low-temperature during the month of September is an agreeable 21.9°C (71.4°F).

Heat index

The heat index value for September is estimated at a fiery hot 37°C (98.6°F). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.
In the scope of the heat index, its values resonate with shade and light wind conditions. The heat index has the potential to rise by 15 Fahrenheit (8 Celsius) degrees with direct sunshine exposure.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
The natural method the human body uses to remove excess heat is by perspiring and letting sweat evaporate. An increase in relative humidity disrupts body cooling by slowing the evaporation rate, thereby reducing the rate at which the body cools and amplifying the sense of heat. The body is at risk of dehydration and related complications when it fails to shed excessive heat.

Humidity

In September, the average relative humidity is 85%.

Rainfall

In Biro, in September, during 23.5 rainfall days, 100mm (3.94") of precipitation is typically accumulated. Throughout the year, there are 139.7 rainfall days, and 607mm (23.9") of precipitation is accumulated.

Daylight

In September, the average length of the day is 12h and 11min.
On the first day of the month, sunrise is at 06:38 and sunset at 18:57. On the last day of September, sunrise is at 06:36 and sunset at 18:39 WAT.

Sunshine

In Biro, Benin, the average sunshine in September is 7.4h.

UV index

The average daily maximum UV index in September in Biro is 7. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The average daily UV index of 7 in September transforms into the following instructions:
Stay clear of intense sun exposure. Solar protection is of utmost significance. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.