September weather forecastKoumantou, Mali
September
Weather in September
The first month of the autumn, September, is still a tropical month in Koumantou, Mali, with an average temperature fluctuating between 31.5°C (88.7°F) and 21.9°C (71.4°F).Temperature
The transition from August to September sees an average high-temperature of a still hot 31.5°C (88.7°F), indicating a minor variance from the prior month. Koumantou's nights in September experience an average temperature drop to an agreeable 21.9°C (71.4°F).Heat index
During September, the heat index is computed to be a scorching 42°C (107.6°F). Implement additional preventive actions, heat cramps and heat exhaustion are potential hazards. Heatstroke could follow prolonged activity.Records show heat index calculations are tailored for shaded regions and mild winds. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a single figure representing how weather conditions feel when combining temperature and humidity. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
Evaporating sweat, an outcome of perspiration, is key in assisting the human body to moderate its temperature. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.
Humidity
In September, the average relative humidity in Koumantou is 79%.Rainfall
In Koumantou, in September, during 19.5 rainfall days, 101mm (3.98") of precipitation is typically accumulated. Throughout the year, in Koumantou, Mali, there are 114.2 rainfall days, and 591mm (23.27") of precipitation is accumulated.Daylight
The average length of the day in September in Koumantou, Mali, is 12h and 11min.On the first day of September in Koumantou, Mali, sunrise is at 06:17 and sunset at 18:37. On the last day of the month, sunrise is at 06:16 and sunset at 18:18 GMT.
Sunshine
The average sunshine in September in Koumantou, Mali, is 8.7h.UV index
The average daily maximum UV index in September is 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: A daily maximum UV index of 7 in September translates into the following instructions:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Koumantou, Mali
- Average high temperature in September: 31.5°C
The warmest month (with the highest average high temperature) is April (40.7°C).
The month with the lowest average high temperature is August (30.1°C).
- Average low temperature in September: 21.9°C
The month with the highest average low temperature is April (26.9°C).
The coldest month (with the lowest average low temperature) is December (19.1°C).
Average pressure in September
Koumantou, Mali
- Average pressure in September: 1012.2mbar
The month with the highest atmospheric pressure is August (1012.3mbar).
The month with the lowest atmospheric pressure is April (1008.3mbar).
Average wind speed in September
Koumantou, Mali
- Average wind speed in September: 5.9km/h
The windiest month (with the highest average wind speed) is January (9.3km/h).
The calmest month (with the lowest average wind speed) is September (5.9km/h).
Average humidity in September
Koumantou, Mali
- Average humidity in September: 79%
The month with the highest relative humidity is August (83%).
The months with the lowest relative humidity are January and February (15%).
Average rainfall in September
Koumantou, Mali
- Average rainfall in September: 101mm
The wettest month (with the highest rainfall) is August (192mm).
The driest month (with the least rainfall) is December (0mm).
Average rainfall days in September
Koumantou, Mali
- Average rainfall days in September: 19.5 days
The month with the highest number of rainy days is August (24.5 days).
The month with the least rainy days is December (0.1 days).
Average daylight in September /
Average sunshine in September
Koumantou, Mali
- Average daylight in September: 12h and 12min
The month with the longest days is June (Average daylight: 12h and 48min).
The month with the shortest days is December (Average daylight: 11h and 30min).
- Average sunshine in September: 8h and 42min
The months with the most sunshine are February and November (Average sunshine: 9h and 54min).
The month with the least sunshine is August (Average sunshine: 7h and 12min).
Average sunshine days in September
Koumantou, Mali
- Average sunshine days in September: 8.6 days
The month with the most sunshine days is December (30.9 days).
The month with the least sunshine days is August (5.4 days).
Average UV index in September
Koumantou, Mali
- Average UV index in September: 7
The months with the highest UV index are February, March, April and May (UV index 8).
The month with the lowest UV index is August (UV index 6).
Average cloud cover in September
Koumantou, Mali
- Average cloud cover in September: 37
The month with the most cloud cover is August (Cloud cover 51).
The month with the least cloud cover is December (Cloud cover 7).
Average visibility in September
Koumantou, Mali
- 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).





