September weather forecastTelu, Sierra Leone
September
Weather in September
September, the first month of the autumn in Telu, is still a warm month, with an average temperature ranging between max 28.6°C (83.5°F) and min 21.8°C (71.2°F).Temperature
The average high-temperature is a still moderately hot 28.6°C (83.5°F) in September, hardly different from the 27.5°C (81.5°F) recorded in August. Throughout September, the average low-temperature dips to an agreeable 21.8°C (71.2°F).Heat index
The heat index value for September is evaluated at a sweltering 36°C (96.8°F). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.When referencing the heat index, its values are suitable for shady environments and light breezes. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.
Humidity
The months with the highest humidity are August and September, with an average relative humidity of 92%.Rainfall
In Telu, Sierra Leone, in September, it is raining for 29.7 days, with typically 265mm (10.43") of accumulated precipitation. Throughout the year, there are 256.6 rainfall days, and 1628mm (64.09") of precipitation is accumulated.Daylight
In September, the average length of the day is 12h and 10min.On the first day of the month, sunrise is at 06:38 and sunset at 18:54. On the last day of September, sunrise is at 06:34 and sunset at 18:38 GMT.
Sunshine
In September, the average sunshine is 4.5h.UV index
The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum high UV index of 6 in September translates into the following recommendations:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Telu, Sierra Leone
- Average high temperature in September: 28.6°C
The warmest months (with the highest average high temperature) are February and March (36.8°C).
The month with the lowest average high temperature is August (27.5°C).
- Average low temperature in September: 21.8°C
The month with the highest average low temperature is April (23.8°C).
The coldest month (with the lowest average low temperature) is January (20.1°C).
Average pressure in September
Telu, Sierra Leone
- Average pressure in September: 1013.1mbar
The month with the highest atmospheric pressure is July (1014.1mbar).
The months with the lowest atmospheric pressure are February and March (1010.5mbar).
Average wind speed in September
Telu, Sierra Leone
- Average wind speed in September: 5km/h
The windiest month (with the highest average wind speed) is April (5.9km/h).
The calmest month (with the lowest average wind speed) is November (3.5km/h).
Average humidity in September
Telu, Sierra Leone
- Average humidity in September: 92%
The months with the highest relative humidity are August and September (92%).
The month with the lowest relative humidity is February (66%).
Average rainfall in September
Telu, Sierra Leone
- Average rainfall in September: 265mm
The wettest month (with the highest rainfall) is August (341mm).
The driest month (with the least rainfall) is January (5mm).
Average rainfall days in September
Telu, Sierra Leone
- Average rainfall days in September: 29.7 days
The month with the highest number of rainy days is August (30.5 days).
The month with the least rainy days is January (4.3 days).
Average daylight in September /
Average sunshine in September
Telu, Sierra Leone
- Average daylight in September: 12h and 12min
The month with the longest days is June (Average daylight: 12h and 36min).
The month with the shortest days is December (Average daylight: 11h and 42min).
- Average sunshine in September: 4h and 30min
The month with the most sunshine is January (Average sunshine: 9h and 36min).
The month with the least sunshine is August (Average sunshine: 3h and 6min).
Average sunshine days in September
Telu, Sierra Leone
- Average sunshine days in September: 0.2 days
The month with the most sunshine days is January (25.3 days).
The month with the least sunshine days is September (0.2 days).
Average UV index in September
Telu, Sierra Leone
- Average UV index in September: 6
The months with the highest UV index are January, February, March, April, November and December (UV index 7).
The months with the lowest UV index are July and August (UV index 5).
Average cloud cover in September
Telu, Sierra Leone
- Average cloud cover in September: 79
The month with the most cloud cover is August (Cloud cover 85).
The month with the least cloud cover is January (Cloud cover 23).
Average visibility in September
Telu, Sierra Leone
- Average visibility in September: 6km
The months with the highest visibility are February, March and April (9km).
The months with the lowest visibility are June, July, August, September, October and November (6km).





