September weather forecastYonibana, Sierra Leone

Weather in September

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

Yonibana experiences a subtle adjustment in high-temperatures to a still warm 28.9°C (84°F) with the onset of September, maintaining near parity with August's 27.7°C (81.9°F). During the month of September, Yonibana experiences a steady low-temperature average of 21.8°C (71.2°F).

Heat index

September's mean heat index is calculated to be a fiery hot 37°C (98.6°F). Greater preventive actions are needed, heat exhaustion and heat cramps are likely. Persistent activity could provoke heatstroke.
Heat index's context suggests values are appropriate for shady areas and slight breezes. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. 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 especially crucial for babies and toddlers. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. Under conditions of high relative humidity, the rate of evaporation decreases. This results in the body retaining more heat than under conditions of dry air. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.

Humidity

In September, the average relative humidity 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

The average length of the day in September is 12h and 10min.
On the first day of September in Yonibana, sunrise is at 06:40 and sunset at 18:56. On the last day of the month, 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 of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for the average person.
Note: The maximum daily UV index, 6 in September, converts into the following recommendations:
Deflect overexposure. Sun protection is a necessity. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. Employ a wide-brim hat for potent defense against up to 50% of UV rays.