September weather forecast
Mapaki, Sierra Leone

The first month of the autumn, September, is also a moderately hot month in Mapaki, Sierra Leone, with an average temperature varying between 28.9°C (84°F) and 21.8°C (71.2°F).

Temperature

In September, the average high-temperature is relatively the same as in August - a still moderately hot 28.9°C (84°F). In Mapaki, the average low-temperature is 21.8°C (71.2°F).

Heat index

In September, the average heat index is calculated to be a very hot 37°C (98.6°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'apparent temperature', 'feels like', or 'felt air temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (metabolic differences, differences in body mass, height, and shape, wind). Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In September, the average relative humidity is 92%.

Rainfall

In Mapaki, Sierra Leone, during 28.6 rainfall days, 261mm (10.28") of precipitation is typically accumulated. In Mapaki, during the entire year, the rain falls for 225.8 days and collects up to 1471mm (57.91") of precipitation.

Daylight

In Mapaki, the average length of the day in September is 12h and 10min.
On the first day of the month, sunrise is at 06:39 and sunset at 18:56. On the last day of September, in Mapaki, Sierra Leone, sunrise is at 06:35 and sunset at 18:39 GMT.

Sunshine

In Mapaki, the average sunshine in September is 5.2h.

UV index

In September, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 6 in September interpret into the following advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.