Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
Welcoming September, Niasso notes an average high-temperature of a fiery hot 35°C (95°F), nearly consistent with August's 33.5°C (92.3°F). September is noted for a mean low-temperature of 24.9°C (76.8°F).Heat index
The heat index value for September is estimated at a blazing hot 45°C (113°F). Take caution: Heat exhaustion and heat cramps are probable. Heatstroke may be imminent with ongoing effort.The standards for the heat index are set for locations in shade and under light breezes. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a metric representing the sensation of warmth when air temperature and moisture come together. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.
Through perspiration, the body has a natural mechanism to eliminate excessive heat via sweat evaporation. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. 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 is 59%.Rainfall
In Niasso, Mali, during September, the rain falls for 10.2 days and regularly aggregates up to 37mm (1.46") of precipitation. In Niasso, during the entire year, the rain falls for 66.1 days and collects up to 257mm (10.12") of precipitation.Daylight
The average length of the day in September is 12h and 12min.On the first day of September, sunrise is at 06:07 and sunset at 18:28. On the last day of the month, sunrise is at 06:07 and sunset at 18:08 GMT.
Sunshine
The average sunshine in September is 9.6h.UV index
In September, the average daily maximum UV index in Niasso is 8. A UV Index reading of 8 to 10 represents a very high threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: In September, an average UV index of 8 transforms into the following instructions:
Skin and eyes are vulnerable without protection. Ensure you always take precautions. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in September?
What is the average humidity in September?
How much does it rain in September?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Niasso have in September?
What is the UV index intensity in September?
Average temperature in September
Niasso, Mali
- Average high temperature in September: 35°C
The warmest month (with the highest average high temperature) is April (41.5°C).
The month with the lowest average high temperature is August (33.5°C).
- Average low temperature in September: 24.9°C
The month with the highest average low temperature is May (29.4°C).
The coldest month (with the lowest average low temperature) is January (17.9°C).
Average pressure in September
Niasso, Mali
- Average pressure in September: 1011mbar
The month with the highest atmospheric pressure is January (1012.9mbar).
The month with the lowest atmospheric pressure is April (1007.6mbar).
Average wind speed in September
Niasso, Mali
- Average wind speed in September: 8.7km/h
The windiest month (with the highest average wind speed) is December (12.6km/h).
The calmest month (with the lowest average wind speed) is October (8.3km/h).
Average humidity in September
Niasso, Mali
- Average humidity in September: 59%
The month with the highest relative humidity is August (65%).
The months with the lowest relative humidity are February and March (13%).
Average rainfall in September
Niasso, Mali
- Average rainfall in September: 37mm
The wettest month (with the highest rainfall) is August (122mm).
The driest months (with the least rainfall) are January, February and December (0mm).
Average rainfall days in September
Niasso, Mali
- Average rainfall days in September: 10.2 days
The month with the highest number of rainy days is August (18 days).
The month with the least rainy days is December (0 days).
Average daylight in September /
Average sunshine in September
Niasso, Mali
- Average daylight in September: 12h and 1min
The month with the longest days is June (Average daylight: 12h and 54min).
The month with the shortest days is December (Average daylight: 11h and 24min).
- Average sunshine in September: 9h and 4min
The month with the most sunshine is May (Average sunshine: 12h and 6min).
The month with the least sunshine is November (Average sunshine: 7h and 42min).
Average sunshine days in September
Niasso, Mali
- Average sunshine days in September: 18.5 days
The month with the most sunshine days is December (31 days).
The month with the least sunshine days is August (11.6 days).
Average UV index in September
Niasso, Mali
- Average UV index in September: 8
The months with the highest UV index are April and May (UV index 9).
The month with the lowest UV index is December (UV index 6).
Average cloud cover in September
Niasso, Mali
- Average cloud cover in September: 22
The month with the most cloud cover is August (Cloud cover 33).
The months with the least cloud cover are February, November and December (Cloud cover 7).
Average visibility in September
Niasso, Mali
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
