September weather forecastNiena, Mali
September
Weather in September
The first month of the autumn, September, is a tropical month in Niena, Mali, with an average temperature varying between 31.4°C (88.5°F) and 21.6°C (70.9°F).Temperature
The shift from August to September is characterized by an average high-temperature of a hot 31.4°C (88.5°F), not significantly different from the 29.7°C (85.5°F) of August. During the month of September, Niena's nighttime temperature lowers to an average of 21.6°C (70.9°F).Heat index
For most parts of September, the heat index is computed to be a blistering 41°C (105.8°F). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.Be advised, the heat index considers values for conditions in shade and with a light breeze. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', quantifies the warmth felt when relative humidity is considered. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are extremely significant for children. Kids frequently ignore the importance of taking a break and rehydrating. Thirst is a late symptom of dehydration - thus, it is crucial to stay hydrated, especially during long-lasting physical activities.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. An increase in relative humidity hinders the body's normal cooling function by reducing evaporation, thereby decreasing the rate of body cooling and enhancing the sense of warmth. As body temperatures escalate without effective heat release, one might face dehydration threats.
Humidity
In September, the average relative humidity is 78%.Rainfall
In Niena, in September, it is raining for 22.4 days, with typically 93mm (3.66") of accumulated precipitation. Throughout the year, there are 132.5 rainfall days, and 578mm (22.76") of precipitation is accumulated.Daylight
In September, the average length of the day is 12h and 11min.On the first day of September, sunrise is at 06:15 and sunset at 18:35. On the last day of the month, sunrise is at 06:14 and sunset at 18:16 GMT.
Sunshine
In Niena, the average sunshine in September is 8.8h.UV index
In September, the average daily maximum UV index is 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In September, a regular UV index of 7 translates into these guidelines:
Resist extreme sun exposure. Guarding against solar damage is essential. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Niena, Mali
- Average high temperature in September: 31.4°C
The warmest month (with the highest average high temperature) is April (39.6°C).
The month with the lowest average high temperature is August (29.7°C).
- Average low temperature in September: 21.6°C
The month with the highest average low temperature is April (26.5°C).
The coldest month (with the lowest average low temperature) is January (19°C).
Average pressure in September
Niena, Mali
- Average pressure in September: 1012.1mbar
The month with the highest atmospheric pressure is August (1012.2mbar).
The month with the lowest atmospheric pressure is April (1008.2mbar).
Average wind speed in September
Niena, Mali
- Average wind speed in September: 6.4km/h
The windiest month (with the highest average wind speed) is January (9.9km/h).
The calmest month (with the lowest average wind speed) is September (6.4km/h).
Average humidity in September
Niena, Mali
- Average humidity in September: 78%
The month with the highest relative humidity is August (83%).
The month with the lowest relative humidity is January (15%).
Average rainfall in September
Niena, Mali
- Average rainfall in September: 93mm
The wettest month (with the highest rainfall) is August (187mm).
The driest month (with the least rainfall) is December (0mm).
Average rainfall days in September
Niena, Mali
- Average rainfall days in September: 22.4 days
The month with the highest number of rainy days is August (26.7 days).
The month with the least rainy days is December (0.1 days).
Average daylight in September /
Average sunshine in September
Niena, 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 48min
The month with the most sunshine is May (Average sunshine: 10h and 48min).
The month with the least sunshine is August (Average sunshine: 7h and 30min).
Average sunshine days in September
Niena, Mali
- Average sunshine days in September: 5.8 days
The month with the most sunshine days is December (30.6 days).
The month with the least sunshine days is August (3.6 days).
Average UV index in September
Niena, Mali
- Average UV index in September: 7
The months with the highest UV index are February, March, April and May (UV index 8).
The months with the lowest UV index are July, August and December (UV index 6).
Average cloud cover in September
Niena, Mali
- Average cloud cover in September: 34
The month with the most cloud cover is August (Cloud cover 48).
The month with the least cloud cover is December (Cloud cover 6).
Average visibility in September
Niena, Mali
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, October, November and December (10km).
The month with the lowest visibility is August (8km).
