September weather forecast
Yonibana, Sierra Leone

The rainfall recedes slightly in September in Yonibana, Sierra Leone, which witnesses a marginal decrease in average highs and lows as well. It's a mirror version of August with subtly changing weather variables. The humidity is still at the higher end of the scale, and the sun is seldom visible. The city records a noticeable decrease in rainfall measuring 249mm (9.8"). This slow transition from the wet season to a less rainy month is indicative of the upcoming dry season.

Temperature

The onset of September brings with it an average high-temperature of a still moderately hot 28.9°C (84°F), showing a negligible variation from the month before. Nighttime temperatures in Yonibana consistently average a pleasant 21.8°C (71.2°F) during September.

Heat index

The average heat index in September is calculated to be a very hot 37°C (98.6°F). Extra safeguards are necessary to prevent heat exhaustion and heat cramps. Prolonged activity might cause heatstroke.
Research indicates the heat index considers values in shaded locales and with light winds. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', offers an insight into how hot it feels when we factor in moisture content. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.
In high temperatures, perspiration kicks in, allowing the human body to cool down through the evaporation of sweat. In the presence of abundant moisture in the atmosphere, the cooling process through evaporation is hindered, causing the body to feel excessively warm. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

In Yonibana, the average relative humidity in September is 92%.

Rainfall

In Yonibana, Sierra Leone, during September, the rain falls for 28.8 days and regularly aggregates up to 249mm (9.8") of precipitation. Throughout the year, in Yonibana, there are 228.1 rainfall days, and 1418mm (55.83") of precipitation is accumulated.

Daylight

In Yonibana, the average length of the day in September is 12h and 10min.
On the first day of the month, sunrise is at 06:40 and sunset at 18:56. On the last day of September, sunrise is at 06:37 and sunset at 18:40 GMT.

Sunshine

In Yonibana, the average sunshine in September is 5h.

UV index

In September, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for average individuals.
Note: During September, 6 as the daily maximum UV index converts into the following advice:
Dodge overexposure. Fair-skinned people can get singed in less than 20 minutes. 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. During bright days, sunglasses that offer UVA and UVB defense are recommended.