September weather forecastEtoumbi, Congo
September
Weather in September
September witnesses the reemergence of prime monsoon conditions with an increase in cloud cover around Etoumbi. While temperatures remain relatively steady, rainfall starts to increase, thus piling on the humidity. Rainfall ascends again, reaching a significant 132mm (5.2") within the month. As October nears, prepare for an amplified version of the wet and humid conditions birthed in September.Temperature
The transition from August to September brings an average high-temperature of a still tropical 30.5°C (86.9°F), barely different from August's 31.8°C (89.2°F). Throughout the nights in September, Etoumbi experiences an average low-temperature of 21.8°C (71.2°F).Heat index
For most parts of September, the heat index is appraised at a blisteringly hot 40°C (104°F). Emphasize additional safety, risk of heat cramps and heat exhaustion is high. Continuous activity might result in heatstroke.Heat index details are generally centered around shaded locations and a mild breeze. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'real feel' or 'feels like', combines air temperature and relative humidity to represent a human perceived temperature equivalent. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. 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 hold particular significance for children. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
Evaporating sweat, thanks to perspiration, acts as a natural air conditioner for the human body. When there is an excess of moisture in the atmosphere, the efficiency of the evaporation process is lessened, leading to less efficient body cooling and a sensation of overheating. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.
Humidity
The average relative humidity in September is 81%.Rainfall
In September, the rain falls for 27.2 days. Throughout September, 132mm (5.2") of precipitation is accumulated. Throughout the year, there are 270.9 rainfall days, and 1169mm (46.02") of precipitation is accumulated.Daylight
The months with the shortest days are March and September, with an average of 12h and 6min of daylight.On the first day of the month, sunrise is at 05:56 and sunset at 18:03. On the last day of September, sunrise is at 05:46 and sunset at 17:53 WAT.
Sunshine
In Etoumbi, the average sunshine in September is 7.9h.UV index
August through October, 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 health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: A typical high UV index of 6 in September suggests the following recommendations:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Etoumbi, Congo
- Average high temperature in September: 30.5°C
The warmest month (with the highest average high temperature) is January (34.3°C).
The month with the lowest average high temperature is October (30.1°C).
- Average low temperature in September: 21.8°C
The month with the highest average low temperature is February (23.1°C).
The coldest month (with the lowest average low temperature) is October (21.5°C).
Average pressure in September
Etoumbi, Congo
- Average pressure in September: 1011.8mbar
The month with the highest atmospheric pressure is July (1012.3mbar).
The month with the lowest atmospheric pressure is February (1009mbar).
Average wind speed in September
Etoumbi, Congo
- Average wind speed in September: 5km/h
The windiest month (with the highest average wind speed) is August (5.4km/h).
The calmest month (with the lowest average wind speed) is November (4.1km/h).
Average humidity in September
Etoumbi, Congo
- Average humidity in September: 81%
The month with the highest relative humidity is October (85%).
The month with the lowest relative humidity is January (63%).
Average rainfall in September
Etoumbi, Congo
- Average rainfall in September: 132mm
The wettest month (with the highest rainfall) is October (182mm).
The driest month (with the least rainfall) is January (33mm).
Average rainfall days in September
Etoumbi, Congo
- Average rainfall days in September: 27.2 days
The month with the highest number of rainy days is October (28.7 days).
The month with the least rainy days is January (14.2 days).
Average daylight in September /
Average sunshine in September
Etoumbi, Congo
- Average daylight in September: 12h and 6min
The month with the longest days is June (Average daylight: 12h and 6min).
The months with the shortest days are March and September (Average daylight: 12h and 6min).
- Average sunshine in September: 7h and 54min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is October (Average sunshine: 7h and 12min).
Average sunshine days in September
Etoumbi, Congo
- Average sunshine days in September: 1.9 days
The month with the most sunshine days is January (14.6 days).
The month with the least sunshine days is October (1.5 days).
Average UV index in September
Etoumbi, Congo
- Average UV index in September: 6
The months with the highest UV index are January, February, March, April, May, June, July, November and December (UV index 7).
The months with the lowest UV index are August, September and October (UV index 6).
Average cloud cover in September
Etoumbi, Congo
- Average cloud cover in September: 45
The month with the most cloud cover is October (Cloud cover 53).
The month with the least cloud cover is January (Cloud cover 26).
Average visibility in September
Etoumbi, Congo
- Average visibility in September: 8km
The months with the highest visibility are January and July (10km).
The month with the lowest visibility is October (7km).








