September weather forecastBoundji, Congo
September
Weather in September
September marks the beginning of another rainy period in Boundji, Congo with rainfall jumping to 130mm (5.12"). Temperatures drop slightly to a high of 31.4°C (88.5°F). With increased precipitation, September offers an in-between weather scenario. This month is mainly characterized by increased cloud cover and rainfall, with fewer hours of sunlight.Temperature
September's advent presents an average high-temperature of a still tropical 31.4°C (88.5°F), indicating a slight variation from the conditions of the previous month. Boundji reports an average low-temperature of 22.7°C (72.9°F) during the nights of September.Heat index
In September, the heat index is appraised at a scorching 40°C (104°F). Adopt enhanced safety measures, heat exhaustion and heat cramps could occur. Continuous activity may induce heatstroke.Take note of the fact that heat index values are based on shaded circumstances with light airflows. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', quantifies the warmth felt when relative humidity is considered. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. 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 is 73%.Rainfall
In Boundji, during September, the rain falls for 27.5 days and regularly aggregates up to 130mm (5.12") of precipitation. Throughout the year, in Boundji, there are 276.3 rainfall days, and 1248mm (49.13") of precipitation is accumulated.Daylight
In Boundji, the average length of the day in September is 12h and 7min.On the first day of the month, sunrise is at 05:55 and sunset at 18:01. On the last day of September, sunrise is at 05:44 and sunset at 17:52 WAT.
Sunshine
In September, the average sunshine in Boundji is 8.4h.UV index
The month with the lowest UV index in Boundji is September, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index, 6 in September, converts into the following recommendations:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Boundji, Congo
- Average high temperature in September: 31.4°C
The warmest month (with the highest average high temperature) is July (33.3°C).
The month with the lowest average high temperature is November (30°C).
- Average low temperature in September: 22.7°C
The month with the highest average low temperature is August (23.5°C).
The coldest month (with the lowest average low temperature) is November (22.1°C).
Average pressure in September
Boundji, Congo
- Average pressure in September: 1011.6mbar
The month with the highest atmospheric pressure is June (1012.1mbar).
The month with the lowest atmospheric pressure is February (1009.3mbar).
Average wind speed in September
Boundji, Congo
- Average wind speed in September: 6.1km/h
The windiest month (with the highest average wind speed) is August (6.6km/h).
The calmest month (with the lowest average wind speed) is November (5.1km/h).
Average humidity in September
Boundji, Congo
- Average humidity in September: 73%
The months with the highest relative humidity are October and November (81%).
The month with the lowest relative humidity is July (57%).
Average rainfall in September
Boundji, Congo
- Average rainfall in September: 130mm
The wettest month (with the highest rainfall) is October (216mm).
The driest month (with the least rainfall) is July (21mm).
Average rainfall days in September
Boundji, Congo
- Average rainfall days in September: 27.5 days
The month with the highest number of rainy days is October (30.3 days).
The month with the least rainy days is July (13.2 days).
Average daylight in September /
Average sunshine in September
Boundji, Congo
- Average daylight in September: 12h and 6min
The month with the longest days is December (Average daylight: 12h and 12min).
The month with the shortest days is June (Average daylight: 12h and 6min).
- Average sunshine in September: 8h and 24min
The month with the most sunshine is January (Average sunshine: 10h and 18min).
The month with the least sunshine is October (Average sunshine: 7h and 36min).
Average sunshine days in September
Boundji, Congo
- Average sunshine days in September: 1.4 days
The month with the most sunshine days is July (15.9 days).
The month with the least sunshine days is October (0.4 days).
Average UV index in September
Boundji, Congo
- Average UV index in September: 6
The months with the highest UV index are January, February, March, April, May, June, July, August, October, November and December (UV index 7).
The month with the lowest UV index is September (UV index 6).
Average cloud cover in September
Boundji, Congo
- Average cloud cover in September: 40
The month with the most cloud cover is October (Cloud cover 47).
The months with the least cloud cover are June and July (Cloud cover 27).
Average visibility in September
Boundji, Congo
- Average visibility in September: 9km
The months with the highest visibility are February, June, July and August (10km).
The months with the lowest visibility are October and November (8km).








