September weather forecastAdeli, Benin
September
Weather in September
As September approaches in Adeli, gradual drying begins, and the wet season starts to wind down. Reduction in rainfall, slight relief in humidity, and overall cooler temperatures become increasingly noticeable. During this month, a slight drop in rainfall to 111mm (4.37") marks the impending end of the rainy season. October ushers in a significant reduction in temperatures, and a decrease in rainfall. Meanwhile, sunshine hours start to increase, signaling the rollback of the cloud cover.Temperature
The arrival of September denotes a barely perceptible change in the average high-temperatures to a still moderately hot 29.5°C (85.1°F) from August's 28.5°C (83.3°F). September's average low-temperature reading settles at a pleasant 22°C (71.6°F).Heat index
During September, the heat index is evaluated at a torrid 37°C (98.6°F). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.Realize that the values for the heat index are set for shaded places and light winds. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
The body's innate mechanism to counteract overheating is through perspiration, as it leverages the cooling effects of sweat evaporation. In high relative humidity, the body's ability to evaporate heat is diminished, resulting in a heightened feeling of warmth. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.
Humidity
In September, the average relative humidity in Adeli, Benin, is 84%.Rainfall
In Adeli, in September, it is raining for 24.5 days, with typically 111mm (4.37") of accumulated precipitation. In Adeli, during the entire year, the rain falls for 145.9 days and collects up to 630mm (24.8") of precipitation.Daylight
In September, the average length of the day in Adeli is 12h and 10min.On the first day of the month, sunrise is at 06:45 and sunset at 19:02. On the last day of September, sunrise is at 06:42 and sunset at 18:45 WAT.
Sunshine
The average sunshine in September is 7.7h.UV index
In September, the average daily maximum UV index is 7. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the ordinary person.Note: In September, the UV index of 7 transforms into the following advice:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Adeli, Benin
- Average high temperature in September: 29.5°C
The warmest month (with the highest average high temperature) is March (38.8°C).
The month with the lowest average high temperature is August (28.5°C).
- Average low temperature in September: 22°C
The month with the highest average low temperature is April (25.1°C).
The coldest month (with the lowest average low temperature) is January (19.2°C).
Average pressure in September
Adeli, Benin
- Average pressure in September: 1012.3mbar
The month with the highest atmospheric pressure is July (1012.9mbar).
The month with the lowest atmospheric pressure is March (1008.5mbar).
Average wind speed in September
Adeli, Benin
- Average wind speed in September: 5.8km/h
The windiest month (with the highest average wind speed) is January (8.6km/h).
The calmest month (with the lowest average wind speed) is September (5.8km/h).
Average humidity in September
Adeli, Benin
- Average humidity in September: 84%
The month with the highest relative humidity is August (85%).
The month with the lowest relative humidity is January (19%).
Average rainfall in September
Adeli, Benin
- Average rainfall in September: 111mm
The wettest month (with the highest rainfall) is August (129mm).
The driest month (with the least rainfall) is December (0mm).
Average rainfall days in September
Adeli, Benin
- Average rainfall days in September: 24.5 days
The month with the highest number of rainy days is August (26.6 days).
The month with the least rainy days is December (0.1 days).
Average daylight in September /
Average sunshine in September
Adeli, Benin
- Average daylight in September: 12h and 12min
The month with the longest days is June (Average daylight: 12h and 42min).
The month with the shortest days is December (Average daylight: 11h and 36min).
- Average sunshine in September: 7h and 42min
The month with the most sunshine is April (Average sunshine: 11h and 48min).
The month with the least sunshine is August (Average sunshine: 7h and 36min).
Average sunshine days in September
Adeli, Benin
- Average sunshine days in September: 3.9 days
The month with the most sunshine days is December (30.9 days).
The month with the least sunshine days is August (3 days).
Average UV index in September
Adeli, Benin
- Average UV index in September: 7
The months with the highest UV index are February, March and April (UV index 8).
The months with the lowest UV index are July and August (UV index 6).
Average cloud cover in September
Adeli, Benin
- Average cloud cover in September: 44
The month with the most cloud cover is August (Cloud cover 55).
The month with the least cloud cover is December (Cloud cover 3).
Average visibility in September
Adeli, Benin
- Average visibility in September: 8km
The months with the highest visibility are January, February, March, April, May, June, October, November and December (10km).
The months with the lowest visibility are August and September (8km).








